2H08 Countersunk Two-Hole Security Barrel Nuts & Sex Bolts
Countersunk two-hole spanner-drive security barrel nuts — tamper-resistant sex-bolt pairs (male-female screws) with matched countersunk heads that sit flush, male screws with or without shoulders. Steel, A2 or A4 stainless; made to individual customer requirements — construction fields only.
Last updated: 2026-11
Specifications
The countersunk two-hole security barrel nut is the flush-finish member of the security sex-bolt family: a female barrel nut with a protruding internally threaded boss and a countersunk two-hole flange, paired with a male countersunk security screw — the classic male-female, Chicago-screw or architectural-bolt joint, made tamper-resistant by the two-hole drive that no standard tool turns. Both halves carry matched head dimensions so the countersunk pair finishes level and consistent, and the male screws come with or without shoulders depending on whether the joint needs a locating step. The collected page describes this line as made to individual customer requirements — truss and pan head variants exist in the same series, in steel, A2 stainless or A4 stainless, with pin-torx, pin-hex, clutch-head and wave drives available on the same body. As with the pan-head variant, no dimension table is published for this SKU, so this page carries construction and material fields only; barrel diameters, lengths and head angles are confirmed at quotation against the drawing.
| Designation | 2H08 — countersunk two-hole security barrel nut (sex bolt half); tamper-resistant version of the male-female / Chicago screw joint |
|---|---|
| System | Female barrel nut with protruding internally threaded boss + countersunk male security screw; head dimensions matched for a finished appearance |
| Male screw options (source-stated) | With or without shoulders; truss and pan head variants also available in the series |
| Drive | Two-hole spanner drive requiring a special tool or bit; pin TX, pin hex, clutch head and wave drives available on the same concept |
| Materials (collected) | Steel, A2 stainless steel, A4 stainless steel |
| Supply (source-stated) | Security sex bolts made to individual customer requirements |
| Dimensions | No dimension table in the collected source — sizes to customer requirements, confirmed at quotation |
Materials
- Steel
- 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 (2H08 Countersunk Two-Hole Security Barrel Nuts & Sex Bolts) 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
What do I gain making a standard sex-bolt joint tamper-resistant?
A flush face with nothing to turn. The countersunk male-female pair already hides both threads inside the joint; the two-hole drive removes the last grip a standard screwdriver or coin could find, so architectural panels, signage and furniture keep their clean look while resisting casual interference. Legitimate servicing just needs the matching two-hole bit — and the male screw's shoulder option lets you add a locating step where the joint needs it.
How is this ordered differently from catalogued barrel nuts?
As a made-to-order item. The collected page states these security sex bolts are made to individual customer requirements, so the RFQ should carry the drawing: barrel diameter and length, thread, head angle and diameter, material, shoulder or plain male screw, and the drive on both halves. We confirm the full dimension set at quotation rather than publishing table values the source does not provide.
What is the MOQ and lead time for this nut type?
The minimum order quantity is 10,000 pieces. Stock items ship in 3–7 days; non-stock items are confirmed at quotation. Common diameters in this nut type are widely stocked; confirm the exact schedule against quantity and size mix at quotation.
What should an RFQ for this nut type state?
State the designation (for example the spanner-drive SKU and head style), nominal thread size and pitch, material and finish, whether the matching drive tool or bit is needed, the mating screw or stud specification, required certificates, and quantity per size — plus destination country.
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