ISO 14582 Hexalobular Countersunk High Head Screws
ISO 14582 hexalobular socket countersunk flat head screws, high head — M3 to M10, the flush countersunk head with a tall cone that fits a deep six-lobe drive, with the collected geometry rows.
Last updated: 2026-11
Specifications
ISO 14582 is the countersunk member of the hexalobular machine-screw family: a 90°-cone flat head that seats flush, but with the "high head" geometry — a taller cone than a standard countersunk head — so the socket is deep enough for a hexalobular drive to transmit serious torque without stripping. The collected table covers M3 to M10 per size with the thread length b, head diameter dk max, shank ds max, head height k max, drive size (TORX 10 at M3 to 50 at M10), drive A reference and t max. That height is the whole point: a standard flush countersunk head leaves no depth for a six-lobe socket, which is why slotted or cross-recessed drives dominate the ordinary countersunk pages (ISO 2009 / 2010 in this catalog) and why this series exists for drive-critical flush assemblies. One verbatim source defect is flagged and NOT normalized: the M5 t max prints 169 where the M3/M5 progression implies a 1,xx scale — if the M5 socket depth is measurement-critical, quote it per RFQ rather than reading the cell. Drive size, A and dk ladder are clean. Property class and finish are not tabulated by the collected specification — per RFQ.
| Standard | ISO 14582 — hexalobular socket countersunk flat head screws, high head |
|---|---|
| Size range | Threads M3 – M10 |
| Head diameter | dk max: 6,57 (M3) → 21,3 (M10) mm |
| Head height | k max: 2,2 (M3) → 6,5 (M10) mm — the "high head" cone |
| Drive | Hexalobular, source TORX size 10 / 20 / 25 / 30 / 45 / 50, A ref. 2,8 → 8,95 mm |
| Socket depth | t max per size; M5 cell flagged verbatim (source print 169) — per RFQ if critical |
| Property class / finish | Not tabulated by the collected specification — per RFQ |
| thread d | b | dk max | ds max | k max | TORX | A | t max |
|---|---|---|---|---|---|---|---|
| M3 | 18 | 6,57 | 3 | 2,2 | 10 | 2,8 | 1,18 |
| M4 | 20 | 9,02 | 4 | 3,01 | 20 | 3,95 | 169 |
| M5 | 22 | 10,9 | 5 | 3,5 | 25 | 4,5 | 1,89 |
| M6 | 24 | 13,2 | 6 | 4,22 | 30 | 5,6 | 2,22 |
| M8 | 28 | 17,9 | 8 | 5,69 | 45 | 7,93 | 2,99 |
| M10 | 32 | 21,3 | 10 | 6,5 | 50 | 8,95 | 3,3 |
- Row 2 (M4): M4 t max prints 169 against the M3/M5 progression implies a 1,xx scale, likely a lost decimal comma). Carried verbatim, NOT normalized — quote t per RFQ until the value is corroborated.
Materials
- Property class and finish specified per RFQ — flush six-lobe assemblies are commonly 8.8+ steel or stainless; state the seat angle (90°) and exposure at quotation
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 (ISO 14582 Hexalobular Countersunk High Head 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
What does "high head" change about a countersunk screw?
It buys the drive. A standard countersunk head is only as tall as its 90° cone needs to be, which leaves a shallow socket — fine for a slot, useless for a hexalobular under torque. ISO 14582 raises the cone (k max 3,5 mm at M5 against roughly 2,5-class on the slotted ISO 2009 ladder), deepening the socket so the six-lobe bit can transmit and back out repeatedly without cam-out or reaming. The collected geometry makes the cost visible: a taller cone sits slightly above flush before final seating, and the mating counterbore needs the matching height. Compare the drive sizes across this catalog — TORX 25 here at M5 against a 2,5 mm slot on the slotted page — and the torque story tells itself. The M5 t max cell in the collected source is flagged (169 print, not normalized), so confirm that one socket depth per RFQ; class and finish stay per RFQ throughout.
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