Engineering Tools
Reference data for specifying and sourcing fasteners correctly — the numbers a procurement or design engineer actually needs.
Standard cross-reference
Sourcing across regions? Here's how the common standards line up. For full dimensional data per standard, see DIN/ISO Datasheets.
| Fastener type | DIN | ISO | IS (India) | BS (UK) | GB (China) | ANSI / ASME |
|---|---|---|---|---|---|---|
| Hex head bolt | DIN 933 / 931 | ISO 4017 / 4014 | IS 1364 | BS 3692 | GB/T 5782 | ASME B18.2.1 |
| Hex nut | DIN 934 | ISO 4032 | IS 1364 (Pt.3) | BS 3692 | GB/T 6170 | ASME B18.2.2 |
| Socket head cap screw | DIN 912 | ISO 4762 | IS 2269 | BS 4168 | GB/T 70.1 | ASME B18.3 |
| Flat washer | DIN 125 | ISO 7089 | IS 2016 | BS 4320 | GB/T 97.1 | ASME B18.22.1 |
| Spring washer | DIN 127 | ISO 7980 | IS 3063 | BS 4464 | GB/T 93 | — |
| Carriage bolt | DIN 603 | ISO 8677 | — | — | GB/T 12 | ASME B18.5 |