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| astener Type | Diameter | Grades | Grades | Grades | Grades |
|---|---|---|---|---|---|
| Hexagon bolts | M-12 to M-100 | 304 / 304 L | 316 / 316 L | 310 / 310 S | 410 / 431 |
| Hex bolts | M-12 to M-100 | 304 / 304 L | 316 / 316 L | 310 / 310 S | 410 / 431 |
| Hex cap screws | M-12 to M-100 | 304 / 304 L | 316 / 316 L | 310 / 310 S | 410 / 431 |
| Socket head cap screws | M-30 to M-72 | 304 / 304 L | 316 / 316 L | 310 / 310 S | 410 / 431 |
| Hex nuts | M-30 to M-72 | 304 / 304 L | 316 / 316 L | 310 / 310 S | 410 / 431 |
| Hex lock nuts | M-30 to M-72 | 304 / 304 L | 316 / 316 L | 310 / 310 S | 410 / 431 |
| Hex nylock nuts | M-30 to M-64 | 304 / 304 L | 316 / 316 L | 310 / 310 S | 410 / 431 |
| Hex castle nuts | M-12 to M-72 | 304 / 304 L | 316 / 316 L | 310 / 310 S | 410 / 431 |
| Heavy hex nuts | M-12 to M-72 | 304 / 304 L | 316 / 316 L | 310 / 310 S | 410 / 431 |
| Washers | M-12 to M-72 | 304 / 304 L | 316 / 316 L | 310 / 310 S | 410 / 431 |
| Stud bolts | M-12 to M-72 | 304 / 304 L | 316 / 316 L | 310 / 310 S | 410 / 431 |
* Comparison chart for international steel grades for stainless steel boltings
| Grades | European Number | ASTM grade | UNS | British standard | DIN |
|---|---|---|---|---|---|
| 304 | 1.4301 | ASTM A 193 Gr B8 | S 30400 | BS 970 | X 5CrNi1810 |
| 304 L | 1.4306 | ASTM A 320 Ge B8 | S 30403 | BS 970 | X 2CrNi1911 |
| 316 | 1.4401 | ASTM A 193 Gr B8M | S 31600 | BS 970 | X 5 CrNiMo 17 13 2 |
| 316 L | 1.4404 | ASTM A 320 Ge B8M | S 31603 | BS 970 | X 2 CrNiMo 17 13 2 |
| 310 | 1.4841 | ASTM A 479 | S 31000 | BS 970 | X 12 CrNi 25 21 |
| 310 S | 1.4845 | S 31008 | BS 970 | X 12 CrNi 25 21 | |
| 410 | 1.4006 | S 41000 | BS 970 | X 10Cr13 | |
| 431 | 1.4057 | S 43100 | BS 970 | X 20CrNi172 | |
| 316S31 | 1.4401 | ASTM A 193 Gr B8M | S 31600 | BS 970 | X 5 CrNiMo 17 12 2 |
