Ultra-Drive Countersunk Security Machine Screws (UL02)
Countersunk head security machine screws in the Ultra-Drive 2-way reusable pin-in-hexalobular drive, thread sizes M2–M10 in stainless steel (A2/A4), sitting flush in a 90° countersink — the flush-finish reusable security screw for panels where a proud head would foul or catch.
Last updated: 2026-11
Specifications
UL02 is the flush-finish member of the Ultra-Drive line: the same 2-way reusable pin-in-hexalobular security recess as UL01, carried on a 90° countersunk head that sits level with the surface once driven. That matters wherever a proud button head would foul a sliding cover, catch clothing, or read as an invitation on a public-facing panel — sliding lids, hinged access doors, mounting plates under handling traffic. The thread range is M2–M10, the smaller end of the line: this SKU targets instrument and enclosure work rather than heavy guarding. The manufacturer lists stainless steel with A2 and A4 options and tabulates the countersunk head dimensions per size on the line page. Countersunk security screws need one more RFQ field than their button-head siblings — the countersink angle and the mating hole preparation must agree, or the head sits either proud or below the surface; 90° is the metric convention and the form this SKU is drawn to. As with the whole line, the matched driver is part of the order: the recess is the security.
| Line / SKU | Ultra-Drive UL02 — countersunk 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 – M10 metric machine thread; lengths to order |
| Head form | Countersunk head, 90° included angle; head diameter and height tabulated per size by the manufacturer |
| Materials | Stainless steel — A2/A4 options |
| 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 Countersunk Security Machine Screws (UL02)) 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
When is a countersunk security screw the wrong choice?
When the mating part has no countersink. A countersunk head needs a prepared 90° seat — driving one into a plain hole leaves the head proud or splits thin sheet, and the flush look that motivated the choice never appears. If the panel is drilled plain, the button head UL01 is the matching SKU; if the seat exists, UL02 gives the same 2-way reusable security with nothing standing proud of the surface.
What should an RFQ for UL02 screws state?
Thread size and length (M2–M10), material class A2 or A4, confirmation that the mating countersink is 90°, quantity per size, and drive bits with the order — the pin-in-hexalobular recess only works with 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