Ultra-Drive Button Head Security Machine Screws (UL01)
Button head security machine screws in the Ultra-Drive 2-way reusable pin-in-hexalobular drive, thread sizes M2–M16 in A2 or A4 stainless steel, with the drive tool installing and removing the same part — the reusable security screw for panels and enclosures serviced with ordinary workshop tooling.
Last updated: 2026-11
Specifications
Most security screws are one-way by design: they go in, and removal needs a dedicated driver or destructive effort. The Ultra-Drive line takes the opposite trade — a pin-in-hexalobular recess (six lobes with a centre pin, so a standard Torx or hex driver spins out) that is nonetheless 2-way and reusable: the matching Ultra-Drive bit installs and removes the screw indefinitely, which is what you want on enclosures, machine panels and public-facing equipment that authorised staff open regularly but the public must not. UL01 is the button head machine screw of the line, in a low-profile dome that sits proud of the surface without the sharp edge of a hex head, threaded M2 through M16 — the widest range in the line, covering everything from instrument panels to heavy guard panels. The manufacturer tabulates head diameter and head height per size on the line page and lists A2 and A4 stainless steel as the material options, so the line runs fully in stainless: suitable for outdoor and washdown environments without relying on plating. Matched drive bits are ordered alongside the screws — the drive is the security, so tool control is part of the specification.
| Line / SKU | Ultra-Drive UL01 — button head security machine screw, 2-way reusable |
|---|---|
| Drive | Pin-in-hexalobular security recess (2-way: same driver installs and removes; standard Torx/hex drivers blocked by the centre pin) |
| Thread range | M2 – M16 metric machine thread; lengths to order; UNC size table also carried on the line page |
| Head form | Button (low-profile dome) head; head diameter and height tabulated per size by the manufacturer |
| Materials | A2 or A4 stainless steel |
| Reusability | Reusable — designed for repeated install/remove cycles by authorised holders of the drive bit |
Materials
- A2 stainless steel
- A4 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 (Ultra-Drive Button Head Security Machine Screws (UL01)) 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
How does Ultra-Drive differ from one-way security screws?
One-way heads accept installation from a standard driver but resist removal, so any service visit ends in a destroyed fastener. Ultra-Drive is 2-way: the pin-in-hexalobular recess blocks ordinary Torx and hex drivers, while the matched bit — and only the matched bit — both installs and removes the screw without damage. The security therefore lives in tool control: issue the bit to authorised staff and the enclosure stays both sealed and serviceable.
What should an RFQ for UL01 screws state?
Thread size and length (M2–M16 in metric, or the UNC callout if you work in inch), head form confirmation (button head, UL01), material class A2 or A4 for the corrosivity of the environment, quantity per size, and whether drive bits are needed with the order — the pin-in-hexalobular recess is useless without its matched driver. Per-size head dimensions are confirmed with the quotation.
What is the MOQ and lead time for Ultra-Drive security screws?
The minimum order quantity is 10,000 pieces. Stock items ship in 3–7 days; non-stock items are confirmed at quotation. Confirm the exact schedule against quantity and size mix at quotation.
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