4H02 Four-Hole Security Nuts
Four-hole spanner-drive security nuts with four location holes ringed by a slim circular groove, M6–M20 as tabulated — height A 5.5–17.1 mm, groove/feature depth B 1.5–5.2 mm. A2 stainless steel as standard; reusable two-way fixing for low-to-medium torque.
Last updated: 2026-11
Specifications
The four-hole security nut spreads the spanner-drive idea over four location holes in the face, surrounded by a slim circular groove: no hex flats, no slot, and no purchase for a standard tool. The collected tabulation runs M6 to M20 — the A dimension (nut height) stepping 5.5, 7.4, 9.3, 10.3, 13.8 and 17.1 mm across the six sizes, with the B dimension at 1.5 to 5.2 mm — every cell clean and complete. A2 stainless steel is the standard material, which is why the pattern appears on stainless architecture, balustrading and glass panels where the fastener must match its surroundings and survive weather. The nut is a reusable two-way fixing: the special driver installs and removes it freely, so it suits lower-security applications with maintenance access — the tamper-resistance comes from the missing grip, not from destruction. Like all shallow spanner drives it is a low-to-medium torque fixing; specify the joint accordingly.
| Designation | 4H02 — four-hole security nut; four location holes in the face ringed by a slim circular groove |
|---|---|
| Thread range (tabulated) | M6, M8, M10, M12, M16, M20 |
| Dimension A per thread (mm) | M6 5.50 · M8 7.4 · M10 9.3 · M12 10.3 · M16 13.8 · M20 17.1 |
| Dimension B per thread (mm) | M6 1.5 · M8 2.2 · M10 2.7 · M12 3.3 · M16 4.1 · M20 5.2 |
| Security principle | Four-hole spanner drive with special driver — reusable two-way fixing; tamper-resistance from the grip-less face |
| Torque class (source-stated) | Suitable for low-to-medium torque applications; requires a special driver tool to install and remove |
| Material (collected) | A2 stainless steel as standard; other sizes and materials as specials |
| Typical settings (source-stated) | Stainless architecture, balustrading, glass panels |
Materials
- A2 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 (4H02 Four-Hole Security Nuts) 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
Four holes instead of two — what changes in practice?
Driver engagement and aesthetics. Four location holes give the matching driver more contact points than a two-hole pattern, and the slim circular groove keeps the face visually clean — one reason the collected page places this nut on stainless architecture, balustrading and glass panels. The fixing remains reusable and two-way: maintenance crews reinstall it freely, while anyone with a standard spanner gets nothing to turn.
Which spanner-drive security nut should I pick for a given joint?
Start from torque and reuse. All of the shallow multi-hole drives are low-to-medium torque fixings; within that, the two-hole patterns are the most cam-out-prone, the angled pattern adds off-axis removal resistance, and the four-hole pattern buys driver contact and a cleaner face in stainless. Pick by the driver your maintenance team already carries, the finish the surface needs, and how often the joint reopens.
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