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■Non-sparking Tools
■Beryllium Copper & Aluminum Bronze
■Die Forged
■DIN 1810
■For nuts with radial holes.
| Number | D mm | L mm | Be-Cu g | Al-Br g |
| 173C-1002 | 30-32 | 136 | 63 | 50 |
| 173C-1004 | 34-36 | 171 | 95 | 85 |
| 173C-1006 | 40-42 | 171 | 105 | 95 |
| 173C-1008 | 45-50 | 207 | 160 | 145 |
| 173C-1010 | 52-55 | 207 | 170 | 150 |
| 173C-1012 | 58-62 | 243 | 225 | 200 |
| 173C-1014 | 68-75 | 243 | 265 | 240 |
| 173C-1016 | 80-90 | 281 | 375 | 335 |
| 173C-1018 | 95-100 | 281 | 415 | 370 |
| 173C-1020 | 110-115 | 333 | 770 | 690 |
