Standards At A Glance
ASTM F436 and EN 14399-6 are both used for structural washer purchasing, but they belong to different standard systems. Buyers should quote the standard required by the project, drawing or bolt assembly specification rather than treating the names as interchangeable.
| Item | ASTM F436 / F436M | EN 14399-6 / DIN 6916 |
|---|---|---|
| Common project context | ASTM structural bolting references | European high-strength structural bolting references |
| Washer type | Hardened structural washer | Hardened chamfered structural washer |
| Hardness note | Confirm grade and requirement by RFQ | EN 14399-6: 300-370 HV; DIN 6916: 295-350 HV for RFQ reference |
| Finish | Plain, black, zinc or project-specified coating by RFQ | Hot-dip galvanized, Dacromet / zinc-aluminum, phosphated or black finish by RFQ |
When To Use ASTM F436
Use ASTM F436 or F436M when the project specification, bolt set, purchase record or customer drawing names the ASTM reference. Send bolt size, finish, hardness target, inspection document needs and packing details.
When To Use EN 14399-6 Or DIN 6916
Use EN 14399-6 or DIN 6916 when the inquiry follows European high-strength structural bolting practice. DJ WASHERS lists EN 14399-6, DIN 6916 and large DIN 6916 RFQ reference sizes up to M72 on the structural washer page.
Inspection And Documents
Structural washer buyers often ask for material certificates, hardness inspection, dimensional checks and packing traceability. The quality control page explains IQC, first article inspection, IPQC, FQC and batch traceability.
RFQ Checklist
- Standard: ASTM F436 / F436M, EN 14399-6, DIN 6916 or drawing.
- Bolt size and washer size range.
- Finish and corrosion requirement.
- Hardness target and inspection documents.
- Quantity, packing method, pallet requirement and destination.
For sample evaluation before a bulk order, see washer samples on request.