TX02 6-Lobe Pin TX Countersunk Head Security Machine Screws
Countersunk head machine screws on the 6-lobe pin TX drive, M2.6–M12 as tabulated: head diameters 5.2–24 mm, head heights 1.5–6.5 mm, tool sizes TX8–TX55. A2/304 and A4/316 stainless steel as standard; flush-seating two-way reusable security fixing.
Last updated: 2026-11
Specifications
The countersunk machine screw takes the same pin-TX principle — six lobes around a centre pin that blocks standard Torx bits — and seats it flush: the head disappears into a countersunk hole, leaving no profile for grips or tools on exposed surfaces. The collected tabulation runs M2.6 to M12, with head diameters from 5.2 mm to 24 mm, head heights from 1.5 mm to 6.5 mm, and driver sizes stepping TX8 to TX55, one per thread. Like the rest of the line it is a two-way reusable fixing: removable for maintenance, medium security against casual tampering, with reduced slippage and improved torque transfer compared with conventional drives. The collected page states A2/304 and A4/316 stainless steel as the standard materials, M2.5 and non-standard sizes or materials as available to order including parts made to drawings, and UNC/UNF threads as supplyable — the collected imperial table, however, carries only column headers with no legible size markings, so no imperial availability is tabulated here. Pair with pin-TX barrel nuts, wave nuts, shear nuts or Kinmar nuts where the joint needs more than the screw alone.
| Designation | TX02 — countersunk head security machine screw, 6-lobe pin TX drive; seats flush in a countersunk hole |
|---|---|
| Thread range (tabulated) | M2.6, M3, M3.5, M4, M5, M6, M8, M10, M12 |
| Head diameter dk per thread (mm) | M2.6 5.2 · M3 5.6 · M3.5 7.0 · M4 7.8 · M5 9.8 · M6 11.6 · M8 15.2 · M10 17.4 · M12 24 |
| Head height k per thread (mm) | M2.6 1.5 · M3 2.0 · M3.5 2.0 · M4 2.3 · M5 2.8 · M6 3.3 · M8 5.0 · M10 5.1 · M12 6.5 |
| Tool size per thread | M2.6 TX8 · M3 TX10 · M3.5 TX15 · M4 TX20 · M5 TX25 · M6 TX30 · M8 TX40 · M10 TX45 · M12 TX55 |
| Length availability | No legible markings in the collected metric availability matrix — tabulated availability not published; confirmed at quotation |
| Security principle | Two-way reusable pin-TX drive — medium security; only the matching pin-TX driver fixes or removes the screw |
| Materials (collected) | A2/304 and A4/316 stainless steel as standard; M2.5, non-standard sizes and materials to order, including parts made to drawings; UNC/UNF threads supplyable |
Materials
- A2/304 stainless steel
- A4/316 stainless steel
Ordering & documentation
Documents
Shipments are backed by Mill Test Certificate (MTC), Dimensional Report, Salt Spray Test Report on request, with full batch traceability from raw material to finished product. Quality management follows the owner-confirmed compliance list: ISO 9001:2015, RoHS, REACH. Exact document sets are confirmed on the order.
Quotation
- The fastener family (TX02 6-Lobe Pin TX Countersunk Head Security Machine Screws) plus the standard designation from your drawing — DIN / ISO / JIS / ASTM / ANSI, or a drawing for custom parts.
- Size (diameter and length), thread type (metric or inch), property class or grade, and coating or finish.
- Quantity per size and your target delivery date.
- Destination country, and any required documents (for example a mill test certificate) so the quote includes them.
Sample & supply
Minimum order quantity is 10,000 pieces. Stock items run 3–7 days. Quantities or variants outside the standard range are confirmed at quotation.
Storage & shipping
Parts are packed for export and shipped factory-direct to buyers in Europe, Asia, the Americas and the Middle East. Store fasteners dry and protected until installation, and keep coated parts in their packaging until use; specific packing and preservation requirements can be stated on the order and confirmed at quotation.
Frequently asked questions
Where does a countersunk security screw beat a button head?
Anywhere the head must not stand proud: hinged access panels, lift doors, ticket machines, public furniture — surfaces people brush past or where a protruding head gives prying tools a purchase. The pin-TX drive is identical between TX01 and TX02, so the choice is purely the head envelope: the collected table shows, for example, M5 at 9.8 mm head diameter seated flush versus 9.5 mm standing proud. The cost is the countersink — the mating hole must be cut to match, and the flush joint tolerates less surface wear than a button head before the drive becomes shallow.
Can I get these in imperial threads?
The collected page states UNC/UNF threads can be supplied, but its imperial table prints only the thread column headers — No.4-40 through 1/4-20 — with no legible size markings to quote. So the honest answer is: treat imperial as a made-to-order line item. State the UNC or UNF size and length on your RFQ and confirm availability, price and schedule at quotation rather than working from this page.
What is the MOQ and lead time for these security screws?
Minimum order quantity is 10,000 pieces per item. Stocked sizes ship in 3–7 days; sizes quoted as available to order, and non-standard sizes or materials, are quoted with a confirmed schedule. Confirm the exact schedule against quantity and size mix at quotation.
What should an RFQ for these security screws state?
State the designation code (TX01 through TX20) and head style, the drive (6-lobe pin TX — the matching pin-TX driver or bit is required), nominal thread size and length, material and finish, the substrate or mating nut where relevant, required certificates, and quantity per size — plus destination country.
Related knowledge
- Thread-Forming vs Thread-Cutting vs Thread-Rolling Self-Tapping Screws: What the Evidence Settles on Base Material
- Screw Family Selection by Base Material: Wood, Machine and Self-Tapping Threads, Engagement and Coating
- Hex Bolts vs Socket Head Cap Screws: What the Evidence Settles on Strength, Clearance and Cost
Request a Quote
Get factory-direct pricing from the manufacturer.
What to include in your inquiry
- ✓ Standard and property class (e.g. DIN 912, ISO 4762, class 8.8) — or a drawing for custom parts.
- ✓ Sizes, lengths and thread type (metric or inch).
- ✓ Quantity per size and your target delivery date.
- ✓ Destination country, plus any coating or finish requirement.
- ✓ Any documents you need with the shipment (e.g. mill test certificate) so the quote includes them.
- ✓ Your inquiry goes straight to the factory team by email and gets a reply within 24 hours.
- ✓ Factory-direct pricing
- ✓ Standard and custom specifications
- ✓ Factory-direct export to buyers in Europe, Asia, the Americas and the Middle East
- ✓ Full fastener family support