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+86 13143444311
Email：sst@szsst88.com
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Address：Building 9, First Industrial Zone, Tantou Industrial City, Songgang Street, Baoan District, Shenzhen 518105, Guangdong, China
Type:Socket button head screw
Materials:Stainless steel
Surface treatment:Plain
Head Type:Button Head
Drive:Hexagon socket (Allen)
Thread:Thread cutting
Point:Blunt, with cutting slots
Forming:Single Die Heading
Size:M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M14
Number:650
We make socket button head screws in plain A2 stainless with a cutting point, quoting them from M1 to M14. Head and socket depth, thread pitch, the number of cutting slots and the pilot hole come from your drawing, and the first article is driven into your material.
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ISO 9001:2015 · Manufacturing since 1998 · 8,678+ customers · 89 countries and regions
Made to order – there is no stock catalogue. Each part is produced to your drawing, and production starts after drawing review and first-article approval.
A socket button head screw with a cutting point is a stainless steel screw with a low, domed head, a hexagon socket in the centre and a threaded body that ends in a blunt tip with cutting slots. These are quoted from M1 to M14 with Number 650, in plain A2 stainless that has been passivated rather than coated.
Button head. A low dome with a smooth rim, which stands less above the surface than a pan head and leaves no sharp edge for a hand to catch on.
Hexagon socket. An internal hexagon driven with a key, which on a button head sits in a shallow dome and is the only drive.
Thread-cutting point. A blunt end with one or more slots cut through the first threads, so the screw cuts its thread instead of pressing it into the material.
Plain stainless. A2 grade, passivated and uncoated, so the cutting edges and the socket are as made.
This combination is chosen where the joint is a plastic boss, a die-cast housing or a thin metal section, the head has to be smooth and low, and the thread has to be cut rather than forced. A socket button head screw is also the form used where the head is handled: instrument cases, covers and equipment that people touch.
The difference between a thread-cutting screw and a thread-forming one is what happens to the material around the hole. A forming screw presses the material outward and the thread is created by displacement, which leaves the boss in hoop tension for the life of the joint. A cutting screw removes a thin chip; the slots at the point act as cutting edges, and the surrounding material keeps its original stress state.
That matters in plastics more than anywhere else. A glass-filled nylon boss that cracks at the seam six weeks after assembly usually did so because a forming screw stretched it, and the crack started where the moulding weld line was already weak. A cutting screw avoids most of that stress, at the cost of a small amount of material removed and a thread that is slightly less resistant to being pulled out.
The blunt end is part of the same idea. A thread-cutting screw does not need a sharp point to start, because the pilot hole is drilled and the cut begins at the first thread. A flat end lets the screw seat against the bottom of a blind hole and set the depth, which a tapered point cannot do. On a socket button head screw used in a shallow boss, that flat end is often what keeps the head at the height the design asked for.
The head shape adds its own constraint. A button head is a shallow dome, and the hexagon socket is cut into it, so the socket is shallower than on a cap head of the same diameter. The driving torque available is therefore lower, and the screw is intended for joints that are closed, not for joints that are preloaded to a figure.
Stainless decides the rest. The cutting edges stay sharp because there is no coating to blunt them and no plating to chip at the point, and the thread cuts cleanly in plastic and in soft die-cast alloys. In stainless steel sheet the cutting edge wears faster, and the joint is usually better served by a forming screw with a hardened point.
The recorded range is M1 to M14, with lengths made to the drawing. Custom lengths up to 2,000 mm are subject to DFM review after drawing submission. For a socket button head screw the quotation carries head diameter and height, socket size and depth, thread, the number and position of the cutting slots, overall length and the pilot hole.
| Item | How it is defined | What we control |
|---|---|---|
| Head | Button, low dome | Head diameter and height, rim condition |
| Socket | Hexagon in the dome | Across flats and depth against head height |
| Thread | Cutting, fine or coarse | Pitch, core diameter and slot position |
| Point | Blunt with cutting slots | Slot depth, number and concentricity |
| Length | Overall, head included | Length tolerance and thread start |
| Material | A2 stainless | Grade and heat number on the certificate |
| Finish | Passivated, plain | Surface condition and cut edge quality |
The number of cutting slots is not cosmetic. One slot cuts in one place per revolution and loads the boss unevenly; two or three slots balance the cut and are usual above M3. The drawing should say how many, because the point is what the joint depends on.
Socket depth against head height is the number that decides the drive. A button head with a socket that is a little shallow will accept a key that is a little short, and on a screw that has to be removed and refitted on a cover, that difference is the one that rounds the socket first.
Four features carry a socket button head screw with a cutting point, and each one trades something away:
| Feature | What it gives | What it costs |
|---|---|---|
| Button head | Low, smooth, no sharp rim | Less bearing area than a pan head |
| Hexagon socket | Torque without cam-out | Shallow socket in a dome; lower torque |
| Cutting point | No hoop stress in plastic | Removes a thin chip; less pull-out than forming |
| Blunt end | Seats and sets the depth | Needs a drilled pilot, not a punched hole |
| Plain stainless | Cutting edges stay sharp | Galls in aluminium; softer than hardened steel |
The smooth low head is why this screw appears on equipment people handle. A pan head leaves a rim that catches on a cloth or a sleeve; a button head rolls over into the surface, and at the same time it clears a housing wall that a cap head would foul.
The cutting point is the reason the screw exists in plastic assemblies. Where the boss is thin and the wall is near, a forming screw’s outward pressure is what causes the crack, and a cutting screw removes that pressure at the cost of a thread that holds slightly less. For a cover screw that is tightened once and rarely removed, that is the right trade.
The recorded finish is passivation on A2 stainless with no coating. That choice matters most at the cutting point: a coating would sit on the cutting edges, blunt them slightly, and chip off in the chip that the screw produces. On a thread-cutting screw the edge is the function, so it is left as formed and passivated.
| Option | How it protects | Effect on socket and cutting edges | Typical use |
|---|---|---|---|
| A2 stainless, passivated | Passive chromium oxide film | Socket and edges as formed | Plastic and die-cast housings |
| A4 stainless, passivated | Passive film with molybdenum | Socket and edges as formed | Medical and marine equipment |
| Steel, black oxide | Conversion film, oiled | Edges left sharp; no build | Dark instrument covers |
| Steel, zinc plated | Sacrificial zinc | Thin build; socket re-checked | General indoor covers |
| Stainless, electropolished | Thicker passive layer, bright | Slight edge rounding; socket checked | Visible hardware |
Where the joint is a visible cover, electropolishing gives a bright surface and removes the burr at the socket edge that a key would otherwise catch. It also rounds the cutting edges a little, which is why the point is checked after the process and not before.
Where the joint is in aluminium, plain stainless and aluminium will gall, and the practical answers are a lubricant at assembly, a lower driving speed, or a coated steel screw of the same shape when the environment allows it.
Three assemblies where the button head and the cutting point both earn their place:
| Where it sits | The screw closes a cover onto a moulded boss where the wall is thin and a cracked boss would scrap the housing. |
| When it goes wrong | The boss splits at the weld line and the cover cannot be refitted. |
| Why it happens | The material is plastic, the boss is thin, and the thread has to be cut rather than pressed. |
| What we control | Cut slots and pilot hole agreed; first article driven into a moulded sample. |
| Where it sits | The screw holds a front panel or a bezel where the head must stay low and smooth under the hand. |
| When it goes wrong | The socket is shallow and a short key rounds it on the second service. |
| Why it happens | The head is handled, the socket is the only drive, and the height is fixed by the bezel. |
| What we control | Head height and socket depth checked; first article assembled in the bezel. |
| Where it sits | The screw fixes a bracket into a thin section where a forming screw would distort the surrounding face. |
| When it goes wrong | The section deforms around the hole and the bracket no longer sits flat. |
| Why it happens | The section is thin and soft, and the visible face must stay flat. |
| What we control | Pilot hole and cut slots agreed; first article driven into a sample section. |
Four reasons that matter on a screw whose point does the work, each tied to something the drawing has to prove:
|
Cut slots and socket agreed
The number and depth of the cutting slots, the socket depth and the head height are agreed as a set, because each one limits the others on a button head. Basis: Slots, socket and head agreed. |
Headed, slotted and passivated in one route
The dome and socket are formed in one stroke, the thread is rolled, the cutting slots are cut, and the parts are passivated as a batch. Basis: One route from wire to passivated screw. |
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Point checked under magnification
The cutting slots are checked for depth and concentricity under magnification, because a point that is off-centre loads one side of the boss. Basis: Cutting point checked under magnification. |
First article driven into your material
The first article is driven into the customer material and removed, because the pilot hole and the cut are a pair that only the real joint proves. Basis: First article driven into the material. |
These screws are headed on single-die machines that form the domed button head and cut the hexagon socket in one stroke, rolled with the thread the drawing calls for, and then slotted at the point to create the cutting edges. Passivation follows as a batch operation, and the first part of every run is measured on head height, socket depth, thread and slots.
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Cutting the socket into a dome is tighter than cutting it into a cap head. The dome falls away on every side, so the wall between the socket and the head edge thins as the socket gets deeper, and a socket that is one step too deep leaves a head that measures correctly and splits at the rim under a key. The height of the dome is set by the punch, and it is checked on the first part.
Slotting the point is the second controlled step. The slots are cut after rolling, through the first two or three threads, and their depth sets how much of the thread edge is exposed to cut. A shallow slot polishes the hole instead of cutting it; a slot that is too deep weakens the first thread and the screw strips at the start of the joint rather than at the end.
What decides whether these screws pass is the socket, the cutting point, the thread and the head. The inspection agreement covers those four, and the criteria come from the drawing.
Head, socket and point on the projector |
Thread and slot start checked |
Core hardness checked |
Salt-spray testing of the grade |
The point is checked for slot depth, slot count and concentricity with the thread, because an off-centre cut loads one side of a plastic boss and a crack starts there before the joint reaches torque. The socket is checked with the production key and on the projector, since a shallow socket in a dome can pass measurement and still refuse a short key.
A sample of every batch is driven into a moulded or machined sample of the customer material, and then removed. The thread and the slots are inspected afterwards: a cutting screw that produces a torn thread has cut too deep, and one that produces a polished hole has not cut at all, and both look identical before assembly.
Every batch is traceable to the wire it was made from and to the passivation batch that finished it. The grade and heat number appear on the material certificate supplied with the parts, and the inspection records follow the criteria agreed on the drawing.
ISO 9001:2015 |
RoHS test report |
Registered trademark |
Patent: security screw and driver |
With each shipment we supply the material certificate, the inspection record for the dimensions on the drawing and, where it is listed, the third-party report for the grade. The documents carry the drawing revision and the batch number, so a repeat order keeps the same socket depth and the same cutting slots.
More than 8,678 customers in 89 countries and regions have ordered from Shi Shi Tong; 87% of orders come from repeat customers and 56% through referrals. Most projects follow the same route: drawing review, first-article approval, then batches checked against that sample. On a socket button head screw the first article is driven into a sample of the customer’s own material, because the cutting point only proves itself in the material it is meant to cut. Buyers visit during the process to review samples.
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8,678+
customers served
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87%
of orders from repeat customers
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56%
of orders through referrals
|
89
countries and regions shipped to
|
Buyers and quality engineers visit for sample review, process discussion and supplier audits; the visit is arranged around production so the headers and the passivation line can be seen on the day the parts run.
Customer group visit – sample review |
Customer group visit – process discussion |
Customer group visit – factory tour |
Customer visit – project kick-off |
Danish customer – drawing review |
Industry exhibition – meeting customers |
A blunt end with slots cut through the first threads, so the screw removes a thin chip and cuts its thread instead of pressing the material outward.
A forming screw leaves the boss in hoop tension and can crack it later. A cutting screw removes that pressure, which is why it is used in thin moulded bosses.
The cut starts at the first thread, so a sharp point is not needed, and a flat end can seat against the bottom of a blind hole to set the depth.
No. A button head socket is shallow. A key that is too long bottoms out and rounds the socket before the thread work is done.
The cutting edge wears quickly in steel. In steel sheet a forming screw with a hardened point is usually the better choice.
Head diameter and height, socket size and depth, thread pitch, the number and depth of the cutting slots, overall length and the pilot hole.
How a socket button head screw project runs from drawing to repeat delivery:
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1
Send the drawing and the material
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→ |
2
Head, socket and cutting point agreed
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→ |
3
First article driven into your boss
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→ |
4
Batch production and repeat orders
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Each step is confirmed with you before the next one starts; the drawing revision from the first article is what repeat orders are checked against.
For a quotation, send the drawing with the head diameter and height, socket size and depth, thread pitch, cutting slot details, overall length and the pilot hole.
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Head size
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Socket
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Thread pitch
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Cut slots
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Length
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Pilot hole
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Sending a drawing? The form below does not take attachments. Email the PDF, DXF or STEP file to sst@szsst88.com with the part name and quantity in the subject line – the drawing is reviewed and a quotation follows.
+86 13143444311
sst@szsst88.com
