Stainless Steel Flat Strap Door Hinge G-K4129

The G-K4129 Stainless Steel Flat Strap Hinge In Six Photographed Positions

This listing is written from the six frames on this page, and what they show is a stainless steel flat strap hinge family in four sizes: a white background frame with the four members together, three of them folded to 90 degrees as L brackets and the fourth folded into a plus, a drawing of the 100 by 17 millimetre member with its holes and spacings marked, a drawing of the 76 by 16 millimetre member, a drawing of the 59 by 11 millimetre member, a drawing of the 56 by 16 millimetre member with its rivet at the centre, and a four panel grid of the cross member where the two leaves are shown crossed into a plus and the dome rivet is shown as a separate part beside its leaf. Every member is the same construction at a different size: two flat stainless leaves, one of them carrying a dome rivet, and the rivet is the pivot the leaves fold on.

Two points are stated plainly rather than implied. First, the sizes and the hole figures on the drawings, 100 by 17 with 6 millimetre holes, 76 by 16 with 5 millimetre holes, 59 by 11 with 4 millimetre holes and 56 by 16 with 5 millimetre holes and the 38 millimetre span, are marked in the frames and are carried on this page as marked figures rather than as measurements the photographs were taken to prove, and the load a hinge of each size carries is not a number a photograph can give at all, so it is issued against the hinge drawing rather than assumed. Second, the dome rivet is visible as a part in every member and is shown pulled clear of its leaf in the cross frame, and that is the pivot of a hinge of this class, but what a photograph proves is the part being there and being separable, not the working of it, so the pivot is worked on a sample through a full swing before a production order is cut.

The Four Sizes The Drawings Mark

The drawing is the frame a buyer reads the size from, and this family has four of them. The largest member is marked 100 by 17 millimetres with 6 millimetre holes at 25 millimetre spacings, a hinge for a door or a lid where the leaf has to reach across a wide stile. The second is marked 76 by 16 millimetres with 5 millimetre holes at 22 and 18 millimetre spacings, the size that suits a cabinet door or a box lid of ordinary proportion. The third is marked 59 by 11 millimetres with 4 millimetre holes at 13 millimetre spacings, the small size for light lids, panels and boxes. The fourth is marked 56 by 16 millimetres with 5 millimetre holes and a 38 millimetre span, and it is the member whose rivet sits at the centre of its leaf rather than at one end, which is what lets its two leaves cross into a plus instead of folding into an L. A flat hinge family sold in four marked sizes is a family a buyer can specify from the drawing, and the four drawings on this page are the four sizes stated rather than a range left to be guessed.

The hole figures matter as much as the length, because the leaf is only as good as the screws it takes. A 6 millimetre hole on the 100 millimetre member takes a screw that holds a door; a 4 millimetre hole on the 59 millimetre member takes the small screw a light lid wants, and a buyer who orders the wrong size leaf is a buyer who finds out at the bench with a screw that will not hold. That is why the drawings are staged at full size with the dimensions written on them: the size is the first decision on this hinge, the hole is the second, and both are on the frames rather than in a paragraph.

The Two Leaves And The Dome Rivet

Every member of this family is two flat leaves and a dome rivet, and the four panel grid in the gallery reads the construction from four sides. One leaf carries the rivet, the other is plain with its holes, and the two are joined at the rivet so the hinge folds on that single point. The leaf that carries the rivet is the leaf that goes on the moving panel, the door or the lid, and the plain leaf is the one that goes on the fixed face, the case or the box wall, because a flat strap hinge of this class folds on the rivet and the fold is what the door line runs on. The brushed stainless surface runs the length of both leaves, the holes are punched and chamfered so a screw head seats, and the dome of the rivet stands proud of the leaf on the outside, which is the face the hinge shows when the door is closed.

The rivet is the part that decides the life of a flat hinge, because it is the only moving part on the whole piece and it takes every swing the door makes. A rivet that is set loose lets the leaves work against each other, and a rivet that is set tight binds the fold; the frame where the rivet is shown pulled clear of its leaf is the one that shows the part a buyer is actually buying when they buy the fold, and it is the frame that answers the question a trade buyer asks first on a hinge of this class, which is whether the pivot is a pressed rivet that cannot be serviced or a set rivet that can. The answer is on the frame: the dome rivet is a separate part and it is set through the two leaves.

The Cross Member Of The Family

The fourth member is the one frame that shows a different fit, and it is worth a buyer's attention because it is the member a customer asks about after the three L members. Its rivet sits at the centre of the leaf instead of at the end, so the two leaves can be crossed at the rivet into a plus, which is the fit for a joint where two panels meet at a cross rather than at an edge, a cross rail on a gate, a centre mullion on a box or a panel joint that has to hold on both sides of the hinge line. The grid shows that member four ways: the two leaves crossed into the plus, the leaves separated and laid flat side by side, the rivet leaf laid over the plain leaf, and the dome rivet lifted clear of its leaf as a separate part. The four panels together are the case for the cross member: the same two leaves, the same rivet, the same stainless, and a pivot position that lets the hinge serve a cross joint as well as an edge joint.

What The Frames In This Listing Prove

Every structural claim on this page can be pointed at in one of the six frames: the four members of the family in the white background frame, folded to 90 degrees as L brackets and into a plus as the cross member, the marked sizes and hole figures on the four drawings, the two leaf construction with the rivet at one end or at the centre, and the dome rivet shown as a separate part in the cross grid. What no frame on this page proves is the load each size carries, the cycle count the rivet runs and the screw specification the holes are cut for, so none of those figures is carried as a photograph fact. They come from the hinge drawing and the test report, and a figure borrowed from a similar hinge is the most expensive kind of typo in a workshop, so they are issued against this model rather than assumed.

The staged set also omits, on purpose, the remaining frames of this folder that repeat the same positions at slightly different sizes: three four panel grids carrying the L members in the same four poses as each other, one grid per size, which repeat the poses already carried in the family frame and the four drawings. What remains is six different views of the family, and each of the six is used once in the image gallery on this page.

How The Hinge Is Built

The white background frame is the clearest way to read a hinge of this kind: four members side by side, each one two flat stainless leaves joined at a dome rivet, each one folded on that rivet to the position its fit needs, the three end rivet members folded to an L and the centre rivet member folded into a plus. Three things about this construction are worth a buyer knowing before the drawing arrives. First, the leaf is a flat bar rather than a rolled knuckle, so the hinge sits flat on the panel and the fold is a single line at the rivet, which is why the class is called a flat hinge and why it leaves a flat line on a closed door instead of a barrel. Second, the rivet is the only moving part and it is a set part rather than a pressed one, shown separate from its leaf in the cross frame, so a hinge of this kind can be worked and set at the bench. Third, the family is four marked sizes on one construction, so a buyer specifying a door and a box in the same order is specifying two sizes of the same hinge rather than two different hinges.

• Two flat stainless leaves per hinge, brushed finish, holes punched and chamfered for the screw heads.
• Dome rivet as the pivot, at one end on the 100, 76 and 59 millimetre members and at the centre on the 56 millimetre member.
• Four marked sizes on one construction: 100x17, 76x16, 59x11 and 56x16 millimetres as the drawings state.
• Hole figures per size, 6 millimetre on the 100, 5 millimetre on the 76 and the 56, 4 millimetre on the 59.
• Folded to 90 degrees as an L in the family frame, and crossed into a plus in the cross member grid.
• Dome rivet shown lifted clear of its leaf in the cross grid, the part a buyer is buying when they buy the fold.

The Fitting Sequence A Flat Strap Hinge Runs In

A flat strap hinge goes on in a short fixed sequence, and the sequence is worth putting here because it is where a fitter loses the most time. The plain leaf is fixed to the fixed face first, squared to the edge the door line will run on, with the screws in the holes the drawing marks for that size. The moving panel is then offered up with the rivet leaf on it, the leaf is fixed at the position that leaves the fold line where the design wants the panel to swing, and the hinge is worked once through its fold before the last screw goes in, so a leaf that is out of square shows at the fold rather than at the door line a week later. On a hinge of this class the fold is the adjustment, because there is no cam and no slot: the leaf sits where the screws put it, and a leaf a millimetre out is a door line a millimetre out. A hinge fitted in that order takes minutes, and the same hinge fitted with the leaves squared to different edges spends the afternoon being chased by a fitter who cannot see why the door will not sit.

Where A Stainless Steel Flat Hinge Earns Its Keep

A stainless steel flat hinge of this class exists for joints where the hinge has to sit flat and take the room as it comes: cabinet doors and small doors as the class is sold, box lids and chest lids, panel joints and cross joints in fitted work, and the light lids and small panels the 59 millimetre member is cut for. The stainless is the part that earns it in the rooms a plated hinge starts its life on the day it is fitted, kitchens, utility rooms, workshops and any box or cabinet that sees a damp cloth or a wet bench, and the flat leaf is the part that earns it where the hinge line has to stay a line rather than a barrel. The four sizes are the part that earns it on a mixed order: a cabinet door on the 76, a box lid on the 59, a wide stile on the 100 and a cross joint on the 56, one construction across the whole job.

It is the wrong call where the door is heavy and has to be carried by a knuckle: a flat strap hinge is a flat leaf hinge rather than a bearing hinge, and a heavy swing door wants a knuckle and a bearing, which is a different member of our range. It is also the wrong call for a marine or exterior position without the grade question answered first, because the drawing states stainless steel rather than a grade, and for salt air the grade is agreed against the drawing before the order is cut, since a flat leaf that stains at the rivet is a finish problem the order should have caught.

The Hinge, Stated In Full

This page runs on one part, the hinge, and the hinge runs on four numbers and four checks, so the hinge is stated in full here: the hinge size, the hinge drawing, the hinge sample and the hinge carton, the four things the order names and the four things the dock checks, because a hinge order that names the four is a hinge order that can be checked at both ends.

• The hinge size is the first number on the order, one of the four marked members of this family, and the hinge size decides the hole the hinge takes and the panel the hinge suits, so the hinge size goes on the proforma in millimetres rather than as a name.
• The hinge drawing is the document the hinge is cut against and the hinge is checked at, the drawing the leaf length, the leaf width, the hole diameter and the hole spacings live on, the four figures that make a hinge of this class orderable.
• The hinge sample is the hinge the buyer folds and works in the own board, the hinge the rivet is felt on before the order is cut, because the fold is the part a photograph cannot prove and the hinge sample is where it is proved.
• The hinge carton is the carton the hinge leaves in, the hinge counted and bagged by size, the hinge marked with the model number and the size on the label, the hinge checked at the dock against the order rather than the previous job.
• The hinge line is the line the hinge leaves on a closed door, the line the flat leaf keeps and the barrel would break, and the line the leaf squareness is set to.
• The hinge fault is the fault that shows up as a hinge fault and is a fixing fault, a squareness fault or a rivet fault, the fault the checklist below is built to catch before the hinge reaches the door.
• The hinge and the room is the match the stainless leaf is cut for, the room the hinge lives in, the panel the hinge carries and the cloth the hinge sees.
• The hinge order is the order that names the hinge size, the hinge drawing, the hinge sample and the hinge carton, and the proforma that carries the four is the proforma the factory works from.

The Flat Hinge, Stated Plainly

A flat hinge is judged on four things, and this flat hinge states all four: the leaf, the rivet, the hole and the size. The leaf is a flat bar, so the flat hinge sits flat and the fold is one line. The rivet is a set part, so the flat hinge folds on a pivot that can be worked. The hole is the fixing, so the flat hinge holds where the screw holds. The size is the family, so the flat hinge covers a door, a lid and a cross joint from one page.

• The leaf of this flat hinge is a flat stainless bar, and the flat leaf is why the hinge line on a closed door reads as a line.
• The rivet of this flat hinge is a dome rivet set through both leaves, the pivot the flat hinge folds on.
• The hole of this flat hinge is punched and chamfered, so the flat hinge takes a screw head flat on the leaf.
• The size of this flat hinge is one of four marked members, and every size of the hinge is a hinge a cabinet or a box can be ordered on.
• The fold of this flat hinge is 90 degrees as an L, the fit the family frame shows for three of the four hinge members.
• The cross of this flat hinge is the plus the 56 millimetre member folds, the fit that makes the hinge a cross joint hinge as well.
• The stainless of this flat hinge is the material the drawing states, the reason the hinge is bought for kitchens and workshops.
• The sample of this flat hinge is the hinge the buyer folds in their own board, the hinge the order is placed on.
• The carton of this flat hinge is the carton the hinge leaves in, counted by size and marked with the hinge model.
• The order of this flat hinge is the order that names the hinge size, the hinge sample and the hinge carton.

Batch Consistency: Why One Hinge Runs Across A Whole Contract

A contract for a run of cabinet doors is where a flat hinge either earns the order or loses it, because the hinge works on every door in the job, and a hinge that changes between batches is a door line that changes between doors. The consistency a buyer should hold the supplier to is the hinge itself: the leaf length and width batch to batch so the 76 millimetre member stays a 76 millimetre member, the hole centres on the drawing every time so the screws land in the same place on every door, the rivet set the same in every hinge of the run, the leaf square at the fold so the door line runs true, and the brushed stainless surface even across the cartons in each of the sizes. The batch check section below is how the factory holds those points at packing, while the drawing is how the buyer holds them at receipt, because a hinge contract that names the drawing and the model number is a contract that can be checked, and a cabinet contract is the kind where the check matters most, since a door that is three millimetres out on every unit is a room that is three millimetres out.

How This Hinge Sits In Our Range

Within our own hinge range, a buyer choosing a flat hinge is usually choosing between the leaf, the size and the fit, in that order. The leaf sets how the hinge sits on the panel, and this hinge is the flat leaf member, two flat stainless leaves on a dome rivet, the structure the white background frame shows in four sizes, sitting beside the knuckle and cup members of the range that are listed under their own model numbers for the doors that need a barrel or a bore. The size sets what the hinge carries, and this hinge is a family of four marked sizes rather than one member, so a buyer can cover a cabinet run and a box order from one page. The fit sets how the two panels meet, and this hinge covers the edge joint as an L and the cross joint as a plus, the two fits the frames show, which is why the family is bought as a family rather than as a single hinge. A buyer comparing the flat leaf and the knuckle members of the range should compare them on those three points, because the difference is the leaf, and the leaf is a thing a white background photograph shows clearly: the flat hinge is the hinge the frames show.

Specification Summary

How Each Hinge Batch Is Checked Before Packing

Every hinge batch is sampled on four points before packing. Assembly: the two leaves and the dome rivet are checked to be present and seated, the leaves are checked to fold on the rivet without binding at either end of the fold, and the holes are checked to be punched through and chamfered rather than pressed part way. Appearance: the brushed stainless surface is checked for handling scratches and any staining worked at the rivet, which is the part of a flat hinge that shows first on a fitted door, and the dome of the rivet is checked to sit proud and even on every piece. Function: each sampled hinge is folded by hand through the angle its fit uses, the L members to 90 degrees and the cross member to its cross position, so a rivet that is set loose or a leaf that is out of square shows before the carton closes, because a leaf out of square is a door line that will not come true. Packing: carton quantity, inner bag, size marking and the model number on the label are checked against the order rather than the previous job, and the documents a buyer needs at their own customs are issued with the proforma.

Who Supplies This Hinge

This hinge is supplied by Guangzhou Gorgeous Intelligent Technology Co., Ltd., a furniture and architectural hardware business whose range covers hinges, drawer slides, handles, stays, legs, castors, locks and the fitting sets that go with them. The company works to export orders: quantities, carton marking, barcodes and shipping documents are agreed before production rather than after it, and a buyer who specifies the size, the hole and the screw type on the order gets those things made, because that is the only specification the factory works from.

Terms Worth Agreeing Before Two Hinges Are Compared

• Flat hinge: a hinge whose leaves are flat bars that sit flat on the panel and fold on a single line at the rivet, the structure the white background frame shows in four sizes.
• Strap hinge: the long flat leaf hinge class, two flat leaves with the holes along the length, the class the frames show and the class the four marked sizes belong to.
• Stainless steel flat hinge: the material and the leaf form together, a flat hinge whose leaves are stainless steel rather than plated steel, the combination the drawings state with Material: stainless steel.
• Dome rivet: the set rivet that joins the two leaves and forms the pivot, the only moving part on a flat hinge of this class, shown lifted clear of its leaf in the cross grid.
• Leaf: one of the two flat bars of the hinge, the rivet leaf on the moving panel and the plain leaf on the fixed face.
• Hole spacing: the centre to centre distance between the screw holes on a leaf, marked on each drawing because the spacing is what decides where the screws land on the panel.
• Cross fit: the fit of the centre rivet member, two leaves crossed at the rivet into a plus, for a joint where two panels meet at a cross rather than at an edge.
• Drawing: the document that turns a hinge photograph into a hinge specification; the leaf figures, the hole figures and the material note come from it, and we send it with the quotation.

Common Hinge Faults And What They Actually Mean

A flat hinge that works loose on the door over time is almost always a fixing problem rather than a hinge problem. The leaf is the strongest part of that joint; the board it is screwed into is not. In chipboard, MDF and softwood box stock the holding power depends on the pilot hole and the screw gauge, and a leaf that has been screwed and unscrewed while a fitter chases the line loses grip, which shows up later as the leaf sitting proud of the panel or the screws working at the holes while the hinge itself is still sound. The answer is the fixing and the screw gauge, not a heavier hinge, and the drawing names the hole size for the reason.

A hinge that binds through the fold is usually a squareness question on a hinge of this class: the two leaves have to be squared to the same edge line, and a leaf set a degree out is a fold that fights itself every time the door swings, which is a fitting problem wearing a hinge costume. The answer is checking the leaves against the drawing and the sample, not forcing the fold or swapping the hinge for one nobody has specified. A rivet that feels loose is the fault that actually does come from the hinge, and it is a setting question at the bench rather than a defect in the steel, which is why the sample is worked through its fold before the production order is cut.

The faults that actually do come from the hinge are the rivet, the leaf and the hole: a rivet that was set loose, a leaf that was bent in the carton, and a hole that was punched off centre. None of those is a defect in the stainless, but they all show up as one, and the way to keep a stainless steel flat hinge working is the same as the way to keep any flat hinge working, which is to fix it square the first time with the right screws in the right holes and the leaves on the same edge line.

Questions Buyers Ask About This Hinge

• Which of the four sizes do I need? The size follows the panel and the load: the 100 by 17 millimetre member for a door or lid where the leaf has to reach across a wide stile, the 76 by 16 for a cabinet door or an ordinary box lid, the 59 by 11 for a light lid or a small panel, and the 56 by 16 for a cross joint where two panels meet. The four drawings on this page carry the length, the width, the hole diameter and the hole spacing for each, and the sample confirms the one you pick on your own board.
• Is the rivet removable? The dome rivet is shown as a separate part beside its leaf in the cross grid, and it is the pivot the two leaves fold on, so a hinge of this kind can be worked and set at the bench rather than thrown away when it loosens. What the sample confirms is the setting the fold needs for your door and your screw sizes.
• Is it stainless steel or plated? The drawings state Material: stainless steel, and the brushed surface across both leaves is the stainless rather than a coating on steel. The grade for an exterior or salt air position is agreed against the drawing before the order, because the drawing states stainless rather than a grade number.
• What is the cross member for? The 56 by 16 millimetre member has its rivet at the centre of the leaf rather than at one end, so its two leaves can be crossed into a plus. That is the fit for a joint where two panels meet at a cross, a cross rail or a centre mullion, and the cross grid shows it crossed, separated, laid over and with the rivet lifted clear.
• Can I order more than one size in one order? Yes, and that is how a mixed job is usually bought: the model number covers the family, and the order names a count per size, so a cabinet run on the 76 and a box order on the 59 leave in the same carton marking with the sizes marked on the label against the order.
• Are the fixing screws included? Fixing screws are not supplied as standard unless agreed on the order; the drawing lists the hole sizes we would match the screws to, so the screws you use seat in the chamfered hole rather than sitting proud.
• How flat does it sit on the panel? The leaf is a flat bar rather than a rolled knuckle, so the hinge sits flat on the panel and the fold is a single line at the rivet, which is why a closed door on this hinge shows a flat line rather than a barrel. The panels are checked flat at the leaf before the screws go in.

Sign-Off Checklist Before You Order This Hinge

• Size confirmed against the drawing for each door and each box in the order, since the leaf length and width set what the hinge covers.
• Hole diameter and hole spacing confirmed against the drawing, because the screws have to seat in the chamfered hole and land where the panel can take them.
• Load confirmed against the hinge drawing rather than assumed from a similar hinge, with a heavier door moved to a knuckle member of the range.
• Grade confirmed for the room, with an exterior or salt air position agreed against the drawing before the order is cut.
• Fold confirmed on the sample in the buyer's own board, the leaves squared to the same edge line and the rivet worked through the fold the door uses.
• Cross fit confirmed on the sample if the order carries the 56 millimetre member, since the centre rivet is the part that makes the cross joint.
• Picture of the panel edge and the board thickness supplied with the order, so the leaf and the screw are matched to the material rather than guessed.
• Screw specification agreed separately, since fixings are not supplied as standard.
• Counts per size written on the proforma for a mixed order, so the carton marking and the label carry the sizes the job needs.

Ordering

Send the model number G-K4129 with the size or sizes you need and the count for each, the destination port and the carton marking you want. Samples are available before a production order so the hinge can be folded and fixed on your own board, the leaves squared to your edge line, the rivet worked through the fold and the cross member tried on the joint if your order carries it, which is the fastest way for both sides to agree that the leaf seats, the holes take the screws and the fold runs true. The drawings, the fixing sheet and whatever test documentation we hold for this hinge model are issued on request, and delivery and payment terms are agreed order by order on the proforma rather than assumed from a previous order.