TX11 5-Lobe Pin TX CSK Self Tapping Security Screws
Countersunk head 5-lobe pin TX self-tapping security screws, No.6–No.12 as tabulated (3.5–5.5 mm nominal): head diameters 6.6–10.6 mm, head heights 2.1–3.4 mm. Material-coded imperial availability matrix from 1/2″ to 3″; A2 and A4-70 stainless steel, zinc-plated steel on request.
Last updated: 2026-11
Specifications
TX11 is the flush member of the 5-lobe self-tapping pair: a countersunk head that seats into a prepared 90° countersink, a thread-cutting point for sheet and plastic, and the five-lobe plus centre pin drive that the collected page describes as an upgrade from its 6-lobe predecessor precisely because the design is less readily available — fewer circulating bits, higher practical security, same reusable two-way behaviour. The collected tabulation covers No.6 to No.12 (nominal 3.5 to 5.5 mm) with head diameters 6.6–10.6 mm and head heights 2.1–3.4 mm; the page prose claims No.6 to No.14, but the table stops at No.12, so the table governs here and No.14 is a quotation question, not a tabulated size. Supply is stated in A2 and A4-70 stainless steel, zinc-plated steel on request, with A4-70 again noted for medical-equipment security work. The availability matrix is imperial and material-coded: No.6 and No.8 mark from 1/2″ through 2″ with gaps, No.10 marks the same span continuously from 3/4″ up, and No.12 is the long-reach option — marked from 5/8″ through 3″, with the 2″–3″ tail in A4-70. Countersunk plus restricted-bit is the combination specified on public-facing timber-composite and sheet assemblies where a proud head would be noticed before it is tampered with.
| Designation | TX11 — countersunk (CSK) head self-tapping security screw, 5-lobe pin TX drive; seats flush in a 90° countersink, thread-cutting point, matched restricted insert bit |
|---|---|
| Gauge range (tabulated) | No.6, No.8, No.10, No.12 (nominal 3.5–5.5 mm); collected prose claims to No.14 but the table stops at No.12 — No.14 is a quotation item |
| Head diameter dk per gauge (mm) | No.6 6.6 · No.8 7.9 · No.10 9.3 · No.12 10.6 |
| Head height k per gauge (mm) | No.6 2.1 · No.8 2.5 · No.10 3.0 · No.12 3.4 |
| Tool size (collected) | F15-B (No.6) · F20-B (No.8) · F25-B (No.10, No.12) |
| Length availability (as marked) | No.6 1/2″–1 1/2″ (skips 5/8″, 1 1/4″) · No.8/No.10 1/2″–2″ (No.10 continuous from 3/4″) · No.12 5/8″–3″, 2″–3″ A4-70 marker only; unmarked pairs confirmed at quotation — Availability matrix legend (as collected): stainless-triangle marker = A2 stainless steel; black-triangle marker = A4-70 stainless steel |
| Security principle | Reusable two-way fixing; upgraded from 6-lobe pin TX as the design is less readily available; higher-torque capable per the collected page |
Materials
- A2 stainless steel
- A4-70 stainless steel
- Steel, zinc plated (on request)
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 (TX11 5-Lobe Pin TX CSK Self Tapping Security 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
TX10 or TX11 for a sheet-metal enclosure door?
Surface decides. TX11 seats flush — the choice where a sliding element crosses the head, where clothing or hands pass over, or where the fixing should read as ordinary hardware. TX10 keeps the button dome, which tolerates thin sheet that cannot take a countersink and carries a slightly larger bearing circle. Both run the same 5-lobe pin drive, the same restricted bits and the same reusable two-way behaviour, so the head style is the only decision.
Can I get the No.14 gauge the source prose mentions?
Not from the tabulated line: the collected dimension table stops at No.12, and only a prose sentence claims No.6–No.14. This page publishes the table. If a No.14 gauge is designed in, raise it as a quotation line — the collected page states specials can be made to order subject to minimum order — but do not write No.14 into a drawing on the strength of that sentence alone.
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; unmarked matrix pairs, zinc-plated steel on request, and specials made to order 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 and head style, the drive (5-lobe pin TX or 7-lobe pin — matched restricted insert bits required), thread or tapping size and length, the material marker you expect (A2 or A4-70 stainless; zinc-plated steel on request), the substrate or mating part, required certificates, and quantity per size — plus destination country. If you are matching existing fixings, name the drive generation explicitly: 5-lobe, 6-lobe and 7-lobe pin bits are not interchangeable.
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