DIN 7500 D Hex Washer Head Thread Rolling Screws
DIN 7500 D hex washer head thread rolling screws: a wrenchable unslotted hex over an integrated washer face, on the trilobular rolling thread. The collected spec sheet tables M2.5 to M8 with hex width, head height, washer diameter and thickness — the forming screw for powered driving in brackets and heavy sheet.
Last updated: 2026-11
Specifications
Where a TORX or cross recess would cam out at forming torque, the DIN 7500 D takes an external hex: an unslotted hexagon head over an integrated washer face that spreads the bearing load and covers the pilot hole. The collected spec sheet tables the series from M2.5 to M8 — hex width across flats follows the familiar metric hex ladder (5.5 mm at M3 up to 13 mm at M8), so standard sockets work. The washer face thickness grows from 0.6 to 1.3 mm across the range. Pilot-hole pairing from the same sheet: M3 turns into a 2.75 mm hole in a 3.0 mm test plate; M8 into 7.4 mm in 8.0 mm plate. This variant is the usual choice when assembly stations drive by impact or high-torque tooling and the assembly still needs a formed, chipless thread.
| Standard | DIN 7500 D — unslotted hex washer head trilobular thread rolling screw |
|---|---|
| Size range | M2.5 – M8; thread pitch 0.45 (M2.5) to 1.25 (M8) |
| Hex at M3 | Width across flats 5.50 / 5.32 mm; head height 2.00 / 1.52 mm; washer diameter 7.10 / 6.60 mm; washer thickness 0.6 mm |
| Hex at M6 | Width across flats 10.00 / 9.78 mm; head height 5.20 / 4.50 mm; washer diameter 13.00 / 12.00 mm; washer thickness 1.05 mm |
| Hex at M8 | Width across flats 13.00 / 12.73 mm; head height 7.05 / 6.30 mm; washer diameter 17.00 / 16.40 mm; washer thickness 1.3 mm |
| Pilot holes | Sheet pairs test plate to hole by size: M2.5 in 2.5 mm plate → 2.3 mm hole; M3 in 3.0 mm → 2.75 mm; M4 in 4.0 mm → 3.6 mm; M5 in 5.0 mm → 4.6 mm; M6 in 6.0 mm → 5.5 mm; M8 in 8.0 mm → 7.4 mm |
Materials
- Case-hardened steel
- 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 (DIN 7500 D Hex Washer Head Thread Rolling 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
Why a hex washer head on a forming screw?
Forming torque is the peak torque in the joint's life. An external hex transfers it without the drive-socket wear limits of an internal recess, and the integrated washer face spreads the bearing load while covering the pilot hole. The collected table shows the hex sizes tracking the standard metric hex ladder (5.5 mm at M3, 10 mm at M6, 13 mm at M8), so existing sockets drive the screw without dedicated bits.
Which pilot hole does the hex washer series need?
The spec sheet pairs each size with a test-plate thickness and hole diameter: M2.5 in 2.5 mm plate takes 2.3 mm, M4 in 4.0 mm plate takes 3.6 mm, M8 in 8.0 mm plate takes 7.4 mm. These are guideline values for the sheet thickness the table assumes — adjust for your actual substrate and confirm on samples, as with the rest of the DIN 7500 family.
What is the MOQ and lead time for these thread forming screws?
Minimum order quantity is 10,000 pieces per item. Stocked sizes ship in 3–7 days; non-stock diameters, lengths or finishes are quoted with a confirmed schedule. Confirm the exact schedule against quantity and size mix at quotation.
What should an RFQ for these thread forming screws state?
State the standard designation (for example DIN 7500 CE or DIN 7500 ME), the head form and drive, thread size and pitch, length, material and grade (case-hardened steel or A2/A4 stainless), finish, pilot-hole or sheet thickness if you need a hole-size recommendation, required certificates such as a mill test report per EN 10204 3.1, and quantity per size — plus destination country.
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