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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:Torx Head Machine Screws Stainless Steel
Materials:Stainless Steel
Surface treatment:Plain
Head Type:Pan Head
Drive:Torx (six-lobe star)
Thread:Machine thread
Point:Blunt
Forming:Single Die Heading
Size:M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M14
Number:768
We make Torx head machine screws in passivated A2 stainless with a pan head, a six-lobe star recess and a machine thread, quoting them from M1 to M14. Head, recess size and depth, thread and grade come from your drawing, and the first article is driven with your bit.
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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.
These Torx head machine screws have a pan head, a six-lobe star recess and a machine thread, in passivated A2 stainless and quoted from M1 to M14 with Number 768. The star is the drive; the pan head gives a bearing ring; the thread runs to the head.
Pan head. A low dome on a bearing ring, wide enough to spread the clamp without a washer.
Torx recess. A six-lobe star with radiused roots, driven with a matching bit; the contact is on the flanks rather than the corners.
Machine thread. A rolled thread for a tapped hole or a nut, ending in a blunt chamfer.
Passivated stainless. A2 grade, uncoated, so the recess and the thread are as made.
Torx head machine screws are used where a small head has to take a real torque without slipping: electronics, instruments and machine assemblies where a cam-out would mark the surrounding surface or damage the recess beyond repair.
A pan head is a low head, and a low head does not leave much room for a deep recess. A cross in the same head would be shallow at the bottom of its arms and would cam out as the torque rose; a six-lobe star is cut with radiused roots and takes the drive on its flanks, so the same head height delivers more usable torque without the bit climbing out.
That is why the combination is common on small stainless screws. Stainless is soft and galls, the heads are small, and a drive that slips damages the part beyond repair; a star bit that fits seats positively and keeps the load where the recess can take it.
The pan head does the bearing. Its ring spreads the clamp on a thin panel, and on a screw with a star recess the head is usually the visible part, so the ring is also what keeps the fixing from marking the surface. The head is low enough to be unobtrusive and tall enough to hold the recess.
The thread runs to the underside of the head, so the screw can be used in a tapped plate, with a nut, or through a thin stack without losing engagement. On a small screw that matters: there is not much length to waste on a plain shank.
Stainless is the material for the job. A2 passivated needs no coating, so the star is as cut and the bit fits exactly; the trade is galling against another stainless thread, which is managed with a lubricant at assembly rather than with a change of thread.
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 Torx head machine screws the quotation carries head diameter and height, recess size and depth, thread size and length, and the grade.
| Item | How it is defined | What we control |
|---|---|---|
| Head | Pan head | Head diameter, height and face flatness |
| Recess | Torx six-lobe star | Recess size, depth and lobe form |
| Thread | Machine thread to the head | Pitch, length and gauging |
| End | Blunt, chamfered | Chamfer and thread start |
| Material | A2 stainless | Grade and heat number on the certificate |
| Finish | Passivated | Surface condition and recess edges |
| Bit | Torx bit | Size confirmed with the recess |
Recess size and depth belong on the drawing together. A T8 cut shallow and a T8 cut deep are both T8 on paper, and the torque one takes is not the torque the other takes.
Head height follows the recess. A lower pan head looks neater and drives worse; where the joint is tightened to a figure, the standard height is the safer specification.
Three features define the part: the star recess, the pan head ring and the stainless body. The first is the drive, the second spreads the clamp, and the third keeps the recess and the thread exactly as made.
| Feature | What it gives | What it costs |
|---|---|---|
| Torx recess | No cam-out; torque on the flanks | Needs the exact bit size |
| Pan head ring | Load spread without a washer | Stands above the surface |
| Full thread | Engagement along the length | Threads any clearance hole it passes |
| Passivated A2 | Recess and thread as made | Galls dry against stainless |
| Small sizes | Fits miniature assemblies | Bits wear and must be changed |
The no-cam-out property is the reason the star is chosen. A cross at this size with a worn bit climbs out and damages the surrounding surface; a star drives straight until the bit or the recess actually fails, and the failure is easier to see before it happens.
The cost is tool discipline. A star bit that is a size small will not seat, and one that is worn will ream the lobes; on a pan head the recess is the part that ages fastest.
The recorded finish is passivation with no coating on A2 stainless. On a star recess that is the right finish because nothing is added inside the lobes: a coating would narrow the recess and change the bit fit, and the star is the one feature the part depends on.
| Option | How it protects | Effect on recess and head | Typical use |
|---|---|---|---|
| A2 stainless, passivated | Passive chromium oxide film | Recess and thread as made | Electronics and instruments |
| A4 stainless, passivated | Passive film with molybdenum | Recess and thread as made | Marine and medical |
| Steel, zinc plated | Sacrificial zinc | Recess narrowed; re-checked | Indoor general work |
| Steel, black oxide | Conversion film, oiled | No measurable build | Internal mechanisms |
| Steel, nickel plated | Barrier deposit, bright | Recess narrowed; re-checked | Visible consumer parts |
Where the joint is wet, A4 is the grade and the recess is the reason: a rusted star cannot be re-entered cleanly, and a pan head offers little else to grip.
Where the part is visible, a thin coating is the only acceptable one; anything thicker rounds the lobes and the bit no longer seats. Steel with a thin zinc works indoors, and stainless removes the question entirely.
Three assemblies where Torx head machine screws are the fixing:
| Where it sits | The screw closes a housing or retains a board where the head has to be small and the drive must not slip onto the surrounding surface. |
| When it goes wrong | A cross recess with a worn bit cams out and marks the housing. |
| Why it happens | The joint is small, the surface is finished, and the drive is a star. |
| What we control | Recess gauged; first article driven with the production bit. |
| Where it sits | The screw fixes a plate where the joint is tightened to a figure and a slipping drive would damage the part. |
| When it goes wrong | A shallow recess rounds at the torque the joint needs. |
| Why it happens | The joint is tightened by tool, the head is low, and the drive is a star. |
| What we control | Recess depth and bit size agreed; first article tightened to torque. |
| Where it sits | The screw holds a panel on equipment that is washed, where stainless is required and the recess must stay usable. |
| When it goes wrong | A rusted recess cannot be re-entered, and the panel cannot be serviced. |
| Why it happens | The joint is wet, the head is exposed, and the recess is small. |
| What we control | Grade confirmed; first article assembled. |
Four reasons that matter on a star-drive pan head, each tied to what the drawing has to prove:
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Recess and head agreed
Recess size and depth, head diameter and height, thread and grade are agreed as a set, because on Torx head machine screws the drive has to fit inside a low head. Basis: Recess and head agreed. |
Formed, recessed, passivated in one route
The pan head and the star are formed in one route, the thread rolled and the parts passivated so the recess stays as cut. Basis: One route to passivated screw. |
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Recess driven with the bit
The first article is driven with the production bit at the joint torque, because a star that measures correctly can still reject a worn bit. Basis: First article driven with the bit. |
Bit specification recorded
The recess size is recorded with the batch, so a repeat order cannot arrive with a recess that needs a different bit. Basis: Bit specification recorded. |
Shi Shi Tong forms these screws on single-die headers that form the pan head and cut the star recess, then rolls the machine thread and passivates the parts. The first part of every run is measured on head diameter and height, recess size and depth, and thread before the batch continues.
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Cutting a star into a pan head is where the part is decided. The punch has a star-shaped end that has to reach full depth without tearing the radiused roots, and it wears at the roots; a worn punch leaves lobes that look right and drive badly, and the failure appears on the assembly line rather than at the machine.
What decides whether Torx head machine screws pass is the recess, the head, the thread and the grade. The inspection agreement covers those, and the criteria come from the drawing.
Recess and head on the projector |
Thread gauged per batch |
Hardness checked on the wire |
Salt-spray testing of the grade |
The recess is checked for size and depth under magnification and for burrs at the lobes, the head for diameter and height, and the thread is gauged per batch. The grade is confirmed on the mill certificate rather than by appearance.
The first article is driven with the production bit at the joint torque and then released. A recess that drives and will not release is a screw that cannot be serviced, and only that sequence shows it.
Every shipment of Torx head machine screws is traceable to the wire it was made from and to the passivation batch. The grade and heat number are recorded 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 batch we supply the material certificate, the inspection record for the criteria 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 recess and head.
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 Torx head machine screws the first article is driven with the customer’s bit, because the bit is part of the drive. 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
|
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 |
The star drives on six flanks and does not cam out, so a low pan head can take real torque without the bit slipping.
The exact size, in good condition. A bit a size small will not seat, and a worn one reams the lobes.
It can narrow it; on coated parts the recess is gauged after plating, and on stainless nothing is added.
No coating to wear out of the recess, and corrosion resistance on a part that is often in wet or cleaned equipment.
Check the bit size and wear first; the recess may be shallow. Both are set on the first article.
Head diameter and height, recess size and depth, thread size and length, and the grade.
How a Torx head machine screw project runs from drawing to repeat delivery:
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1
Send the drawing and the bit you drive with
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→ |
2
Recess, head and thread agreed
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→ |
3
First article driven with your bit
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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, recess size and depth, thread size and length, the grade and the finish.
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Head diameter
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Head height
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Recess size
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Recess depth
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Thread
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Grade
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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
