TX26 Security Pin TX Drive Cap Screw
Cap head 6-lobe pin security machine screw, M2–M10 as tabulated: head diameters 3.8–16.0 mm, head heights 2.0–10.0 mm, min socket depth t 0.71–3.62 mm, tools TX6–TX50. Two-status availability matrix 3–100 mm (silver = available, red = to order); A4 stainless steel and steel as standard.
Last updated: 2026-11
Specifications
TX26 is the socket-cap silhouette of the pin-TX line: a cylindrical head with a hex-style driving socket, reamed with a centre pin so ordinary hex and Torx bits stop at the pin. The collected page frames the drive as a medium-security, two-way reusable fixing for high-torque work — cam-out resistance being the practical benefit over cross-recess drives, since the lobed bit stays engaged at torque levels where a Phillips would already be spinning out and damaging the recess. The tabulated envelope runs from M2 (3.8 mm head, 2.0 mm high, TX6 tool) to M10 (16.0 mm head, 10.0 mm high, TX50 tool), each size with a stated minimum socket depth. The availability matrix is the only one in this batch with a two-status legend — silver-triangle cells are available, red-triangle cells are to order — and the pattern is worth reading before you standardise on a length: M5/M6/M8 mark available from 5 mm to 90 mm, M2 is a to-order line at almost every length, and the 100 mm tail is marked to order on M10 only. Manufactured from A4 stainless steel and steel as standard, which suits the solar-panel mounting work the collected page categorises this SKU under; non-standard sizes, materials and finishes are specials made to drawings.
| Designation | TX26 — cap head (socket head) security machine screw, 6-lobe pin TX drive; medium security, reusable two-way, high-torque capable; matched insert bit or key wrench required |
|---|---|
| Thread range (tabulated) | M2, M2.5, M3, M4, M5, M6, M8, M10 |
| Head diameter d2 (mm) | M2 3.8 · M2.5 4.5 · M3 5.5 · M4 7.0 · M5 8.5 · M6 10.0 · M8 13.0 · M10 16.0 |
| Head height k (mm) | M2 2.0 · M2.5 2.5 · M3 3.0 · M4 4.0 · M5 5.0 · M6 6.0 · M8 8.0 · M10 10.0 |
| Min socket depth t (mm) | M2 0.71 · M2.5 0.91 · M3 1.01 · M4 1.42 · M5 1.65 · M6 2.02 · M8 2.92 · M10 3.62 |
| Tool size (collected) | TX6 (M2) · TX8 (M2.5) · TX10 (M3) · TX20 (M4) · TX25 (M5) · TX30 (M6) · TX45 (M8) · TX50 (M10) |
| Length availability (as marked) | M2 to order at 3–20 mm (unmarked at 22 mm, 28 mm and upward) · M2.5/M3 marked to 35–50 mm · M4 marked available 5 mm, to order 16–60 mm · M5/M6/M8 available 5–50 mm (M5 to 50 mm, M6/M8 to 90 mm) · M10 to order 16–100 mm; unmarked pairs at quotation — Availability matrix legend (as collected): silver-triangle marker = available from stock; red-triangle marker = to order |
| Security principle | Reusable two-way fixing; centre pin resists standard Torx/hex bits; reduced cam-out vs Phillips and two-hole drives per the collected page |
| Standard materials | A4 stainless steel and steel as standard; specials to drawings on request |
Materials
- A4 stainless steel (standard)
- Steel (standard)
- Non-standard materials and finishes to order as specials
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 (TX26 Security Pin TX Drive Cap Screw) 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
Which lengths actually ship from stock?
Read the matrix by status, not by assumption: the mid-range is the dependable zone — M5, M6 and M8 carry the available marker from 5 mm up to 50 mm (M6 and M8 continuing to 90 mm), while M2 is a to-order line at nearly every length and the 100 mm tail is marked to order on M10. Cells marked to order are normal order lines, not refusals; cells with no marker at all (a few short M2/M2.5 lengths, the 100 mm M8) are quotation lines because the collected legend defines only the two marked statuses.
Why choose a cap head over the button-head pin-TX screws?
The cap head buys you socket depth and torque in a narrow hole: TX26 tabulates a minimum socket depth up to 3.62 mm at M10 and a tall 10 mm head, against the low button profile of the TX01 line. In a counterbored clearance hole or a component with a machined boss, the cap head seats fully and the deep socket keeps the pin-TX bit engaged at high torque — which is the whole point of a reusable security fixing, since a stripped recess defeats maintenance as effectively as a missing bit.
What should an RFQ for TX26 state?
State the designation (TX26 pin TX drive cap screw), thread size and length, the material (A4 stainless or steel as standard), the application if it is solar mounting or similar (so finishes can be matched), required certificates, and quantity per size — noting which of your lengths sit on marked-available cells versus to-order cells if schedule matters. Confirm the matched TX-series insert bit supply with the order.
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