TX09 5-Lobe Pin Button Security Machine Screws
Button head 5-lobe pin security machine screws, M3–M8 as tabulated: head diameters 5.6–13.8 mm, head heights 1.5–4.3 mm. Material-coded availability matrix from 6 mm to 100 mm (55–100 mm marked on M8 only); A2 and A4-70 stainless steel, zinc-plated steel on request.
Last updated: 2026-11
Specifications
The 5-lobe pin drive is the escalation step within the pin-TX family: the collected page positions it as an alternative to Pin Torx Plus screws that provides enhanced security over the common 6-lobe pin TX while keeping the high-torque capability of a lobed drive — one more lobe than a standard Torx, a centre pin that blanks ordinary bits, and a driver population small enough that casual interference stalls for lack of the tool. The head is a low button, tabulated M3 to M8 with head diameters 5.6–13.8 mm and head heights 1.5–4.3 mm; M3 carries no tool size in the collected row, so no M3 tool claim is made here. Supply is stated in A2 and A4-70 stainless steel — the collected page notes A4-70 suits medical-equipment security work — with zinc-plated steel available on request. The availability matrix is material-coded cell by cell: M4 through M6 mark continuously from 6 to 50 mm, M3 marks only at 6 and 12 mm, and M8 marks from 6 through 50 mm in A2/A4-70 and from 55 to 100 mm in A4-70 only — the long M8 lengths are an A4-70 order, which matters if your drawing defaults to A2. The drive is a reusable two-way fixing for higher-torque joints that must still come apart for maintenance by whoever holds the matched insert bit.
| Designation | TX09 — button head security machine screw, 5-lobe pin TX drive (five lobes plus centre pin; matched insert bit installs and removes; positioned as the higher-security alternative to 6-lobe pin TX) |
|---|---|
| Thread range (tabulated) | M3, M4, M5, M6, M8 |
| Head diameter dk per thread (mm) | M3 5.6 · M4 7.4 · M5 9.3 · M6 10.3 · M8 13.8 |
| Head height k per thread (mm) | M3 1.5 · M4 2.8 · M5 2.6 · M6 3.2 · M8 4.3 |
| Tool size (collected) | No.1 (M4) · No.2 (M5, M6) · No.2.5 (M8); no tool size listed for M3 |
| Length availability (as marked) | M3 6, 12 · M4–M6 6–50 continuous · M8 6–50 (A2/A4-70) and 55–100 mm (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; higher security than 6-lobe pin TX with torque capability retained; restricted insert-bit supply 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 (TX09 5-Lobe Pin Button 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
Why specify 5-lobe pin instead of the more common 6-lobe pin TX?
Because the bit is the vulnerability: 6-lobe pin drivers circulate widely enough that they no longer stop a determined person with a toolkit. The collected page frames this 5-lobe line exactly as the upgrade — enhanced security over 6-lobe pin TX with the same high-torque capability — and the button-head TX09 is its machine-thread baseline for enclosures, panels and equipment housings. The trade-off is bit supply: matched insert bits are restricted, so plan spares into the original order rather than expecting local availability.
Which sizes come in A4-70, and why does it matter here?
The collected matrix marks most of the M4–M8 range in both A2 and A4-70, with the long M8 lengths (55–100 mm) marked A4-70 only. A4-70 is the chlorine-resistant grade — the collected page names medical-equipment security as its natural ground — so coastal, wash-down and medical installations should treat A4-70 as the default and check the matrix before assuming a length exists in A2. Any pair you need without a marker is a quotation line.
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