Tel：
+86 13143444311
Email：sst@szsst88.com
Fax：+0086-755-27322278
Address：Building 9, First Industrial Zone, Tantou Industrial City, Songgang Street, Baoan District, Shenzhen 518105, Guangdong, China
Type:Pin Torx Security Screws, Stainless Steel
Materials:Stainless Steel
Surface treatment:Plain
Head Type:Pan Head
Drive:Pin Torx Recess
Thread:Self Tapping Thread
Point:Sharp
Forming:Single Die Heading
Size:M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M14
Number:602
We make pin Torx security screws in passivated stainless with a pan head, a six-lobe recess with a centre pin, a self-tapping thread and a sharp point, quoting them from M1 to M14. Recess size, pin diameter, point and grade come from your drawing, and the first article is driven and removed with your own security 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.
Pin Torx security screws are self-tapping screws whose recess is a six-lobe star with a pin standing in its centre. The star takes a Torx driver, but the pin stops a plain Torx bit from seating, so only a tamper-resistant bit with a hole in its face will turn the screw. This family is made in passivated stainless with a pan head and a sharp point, quoted from M1 to M14 with Number 602.
Pan head. A low dome with a wide flat bearing face, the general-purpose machine head.
Pin Torx recess. Six lobes with a central pin. The lobes are the drive; the pin is the barrier.
Self-tapping thread. A coarse thread with a sharp crest, forming its own thread in a drilled or punched hole.
Sharp point. A tapered end that finds the hole and starts the thread on the first turn.
Passivated stainless. No coating, so the recess and the thread are as formed.
A pin Torx security screw is the security version of the most common high-torque drive in industry. The six lobes are unchanged, so the recess behaves like any Torx when the right bit is used: the bit seats on the walls, the torque goes in without cam-out, and the head survives repeated assembly. The only addition is the pin.
On a pin Torx security screw the pin excludes the ordinary bit. A plain Torx driver cannot go deep enough to engage the lobes, because the pin occupies the centre; the driver for this screw has a hole drilled through its face that clears the pin. That is a small change in the tool and a large change in who can open the joint.
The level of deterrence is the interesting part. Security Torx bits are sold in ordinary driver sets, so a determined person with a reasonable tool kit will have one. What the pin defeats is the improvised attempt and the person with a normal Torx set who has no reason to carry the security version. That is a lower barrier than a rare five-point pin-in form, and it is chosen deliberately where service access matters more than maximum resistance.
On pin Torx security screws there is a practical argument for that trade. A drive that technicians already know, in a security variant whose bits are available, means the joint can be serviced by anyone legitimate without waiting for a special tool — and the screw still stops the casual attempt. On equipment that is maintained by many hands, that balance is often the right one.
The self-tapping thread adds the usual conditions. The point is sharp, so it finds the hole and starts the thread; the thread forms its own way in, so the panel carries the joint rather than an insert. On stainless that means a slightly larger pilot hole and a controlled driver, because the torque to form a thread arrives at a recess that has less material than any other Torx because of the pin.
The recorded range is M1 to M14, covering M1, M2, M3, M4, M5, M6, M7, M8, M9, M10 and M14. Custom lengths up to 2,000 mm are subject to DFM review after drawing submission. For pin Torx security screws the quotation carries head diameter and height, recess size, pin diameter, thread size, point form and the grade, because the bit has to match the recess and the point has to suit the hole.
| Item | How it is defined | What we control |
|---|---|---|
| Head | Pan head, flat face | Head diameter and height |
| Recess | Torx with centre pin | Recess size, depth and pin diameter |
| Thread | Self-tapping, coarse pitch | Pitch and major diameter, gauged |
| Point | Sharp, tapered | Point angle and thread start |
| Finish | Passivated stainless | Surface condition and film |
| Length | Under the head | Measured on the shop plate |
Recess size should be written as the security Torx size, not just the thread, because the bit is a specific part. A customer who orders by thread size alone may receive a recess that their existing security bits do not fit, and the joint then waits for a tool order.
Pin diameter is the other number worth naming. The pin has to leave usable lobes and survive a driver being forced into the recess; on a small head that window is narrow, and it is a manufacturing decision that should be agreed rather than assumed.
Three features define this part: the six lobes, the central pin and the self-tapping point. The first is the drive, the second is the barrier, and the third is how the screw holds in the panel.
| Feature | What it gives | What it costs |
|---|---|---|
| Torx lobes | High torque, no cam-out | Exact bit size required |
| Centre pin | Stops a plain Torx bit | Security bit has to be sourced |
| Self-tapping point | Starts in a formed hole | Needs the right pilot hole |
| Pan head | Load spread on thin panels | Stands above the surface |
| Passivated stainless | Recess stays usable | Galls if driven dry and hard |
On pin Torx security screws the value of the combination is that the assembly does not feel strange. A technician who knows Torx drives this screw with a security bit and finds the same behaviour; the only difference is which bit comes out of the box. On equipment that is assembled and serviced by many people, that familiarity is worth more than an exotic recess nobody has a tool for.
The self-tapping point is what makes the part a fixing rather than just a screw. It has to form a thread in the panel, which takes torque, and that torque arrives at a recess that is slightly weaker than a plain Torx because the pin takes up the middle. A controlled driver, and a pilot hole sized for stainless, are what keep the recess intact.
The recorded finish is passivation with no coating. On a recess with a pin, a coating would narrow the gaps between the pin and the lobes, thicken the pin and round the corners the bit engages — three changes to a drive that has no margin to spare. Passivation leaves the geometry as formed and gives the alloy its corrosion resistance.
| Option | How it protects | Effect on recess | Typical use |
|---|---|---|---|
| A2 stainless, passivated | Passive chromium oxide film | Recess as cut | Outdoor equipment and panels |
| A4 stainless, passivated | Passive film with molybdenum | Recess as cut | Coastal and chemical |
| Steel, zinc plated | Sacrificial zinc | A few microns; recess re-checked | Indoor sealed products |
| Steel, black oxide | Conversion film, oiled | No measurable build | Internal mechanisms |
| Steel, nickel plated | Barrier deposit, bright | Decorative; wears at the recess | Visible fittings |
Where a coating is used, the recess is re-checked after plating. The pin-and-lobe geometry is tighter than a plain star, and a deposit that lands in the gaps can be the difference between a bit that drops in and one that has to be pushed. That check belongs on the first article, not on a complaint.
Where the joint is exposed, the stainless version is the only sensible one. A security recess with a pin holds water in a space that cannot be cleaned, and a plated steel socket rusts there and closes up; on a screw the owner has to be able to open, that is the worst outcome.
Three assemblies where pin Torx security screws are the fixing:
| Where it sits | The screw holds a cover or a fitting reachable by the public, where the joint must resist casual opening but still be serviced by staff with standard tools. |
| When it goes wrong | A plain Torx invites anyone with a driver set, and a recess that is damaged stops the service visit. |
| Why it happens | The joint is exposed, it is serviced, and the tool set is standard. |
| What we control | Recess and pin checked, first article driven and removed with the security bit. |
| Where it sits | The screw closes a panel whose interior is for authorised access, where a familiar drive is wanted for the technicians who open it. |
| When it goes wrong | A rare recess means the technician waits for a tool, and a damaged bit rounds the lobes. |
| Why it happens | The joint is serviced by staff, the drive must be familiar, and the panel is thin. |
| What we control | Recess size on the drawing, first article driven at the joint torque. |
| Where it sits | The screw fixes a cover where the joint sees weather and the recess must stay openable after years outside. |
| When it goes wrong | A plated recess rusts shut, and a pin that has corroded prevents the bit from seating. |
| Why it happens | The joint is wet, the head is exposed, and the part is serviced. |
| What we control | Grade confirmed, recess driven after passivation, salt-spray sample where required. |
Four reasons that matter on a pinned star drive, each tied to what the drawing has to prove:
|
Security size and bit agreed
The security Torx size and the bit are confirmed together, because a recess that does not take the customer’s existing bit leaves the joint waiting for a tool. Basis: Recess size and bit agreed. |
Head, pinned recess and thread in one route
The pan head, the recess and the centre pin are formed in one stroke, the thread is rolled and the parts are passivated. Basis: One route from wire to passivated screw. |
|
Driven and removed with the bit
The first article is driven and removed with the security bit, because a pin that is slightly bent looks correct and refuses the bit. Basis: First article driven and removed. |
First article fixes the setting
The first article fixes the wire, the pin punch and the passivation; repeat orders are compared against that record. Basis: First article signed off before the batch is released. |
Shi Shi Tong forms these pin Torx security screws from stainless wire on single-die headers that cut the pan head, the six-lobe recess and leave the centre pin standing in one stroke, roll the self-tapping thread, form the sharp point and passivate the finished parts. The first part of every run is measured on the head and recess, then driven and removed with the security bit before the batch continues.
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The pin is the part of the punch that fails first. It is a thin column in the middle of the recess, and it has to survive thousands of strokes without bending; a pin that is slightly bent leaves a recess that looks right and refuses the bit, because the hole in the driver cannot be threaded over it. That is why the check at the start of a run is a drive, not a measurement.
What decides whether pin Torx security screws pass is the recess, the pin, the point and the thread. The inspection agreement covers those, and the criteria come from the drawing.
Recess and pin on the projector |
Thread gauged per batch |
Hardness checked on the wire |
Salt-spray testing of the grade |
On pin Torx security screws the recess is checked for lobe size and depth on the projector, and the pin for diameter and for standing true at magnification. Then the first article is driven and removed with the security bit; a recess that measures correctly and refuses the bit is exactly the failure a pinned drive produces, and only the bit finds it.
The thread is gauged per batch, the point is checked for angle and start, and the alloy is confirmed on the certificate. A salt-spray sample is run where the environment asks for it, because a pin that corrodes inside the recess closes the drive that the joint depends on.
Every shipment of pin Torx security 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 or the passivation. The documents carry the drawing revision and the batch number, so a repeat order is made to the same recess geometry that was approved.
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 security part the first article is driven and removed with the customer’s own bit, because the recess is the function. Buyers visit during the process to review samples and to see how the heads and recesses are formed.
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8,678+
customers served
|
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 security Torx bit of the matching size, with a hole in its face to clear the pin. A plain Torx bit will not seat.
Less than a rare custom form, more than a plain recess. The bit is sold in ordinary sets, so it stops the casual attempt rather than a prepared one.
Because the drive is familiar. Anyone legitimate can service the joint with a standard tool set instead of waiting for a special one.
Yes. The thread forms its own way into a pilot hole, so the panel carries the joint and no insert is needed.
The pin takes up part of the head, so the lobes are smaller than on a plain Torx. A worn bit or a hole that is too tight is the usual cause.
Thread size and length, point form, head diameter and height, the security Torx size, the pin diameter and the grade.
How a pin Torx security screw project runs from drawing to repeat delivery:
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1
Send the drawing and the security bit you use
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→ |
2
Recess size, pin diameter and point agreed
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→ |
3
First article driven and removed 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 thread size and length, the point form, the head diameter and height, the security Torx size, the pin diameter and the grade.
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Thread size
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Length
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Point form
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Head diameter
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Security Torx size
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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
