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■ Aluminium Bronze Alloy and Beryllium Copper Alloy
■ Die Forged
■ Tighten or loosen hex bolts and nuts directly
| Number | S mm | L mm | L1 mm | Be-Cu g | Al-Cu g |
| 121A-6 | 6 | 120 | 29 | 40 | 35 |
| 121A-8 | 8 | 144 | 33 | 70 | 60 |
| 121A-10 | 10 | 168 | 37 | 100 | 90 |
| 121A-12 | 12 | 216 | 42 | 155 | 135 |
| 121A-13 | 13 | 240 | 45 | 215 | 190 |
| 121A-14 | 14 | 245 | 45 | 250 | 215 |
| 121A-15 | 15 | 250 | 48 | 280 | 240 |
| 121A-16 | 16 | 255 | 48 | 335 | 290 |
| 121A-17 | 17 | 260 | 51 | 380 | 325 |
| 121A-18 | 18 | 265 | 53 | 420 | 365 |
| 121A-19 | 19 | 270 | 55 | 460 | 400 |
| 121A-20 | 20 | 272 | 57 | 520 | 450 |
| 121A-21 | 21 | 275 | 57 | 650 | 550 |
| 121A-22 | 22 | 278 | 59 | 750 | 645 |
| 121A-23 | 23 | 282 | 60 | 800 | 680 |
| 121A-24 | 24 | 286 | 63 | 850 | 700 |
| 121A-27 | 27 | 294 | 69 | 900 | 800 |
| 121A-30 | 30 | 302 | 75 | 1000 | 880 |
| 121A-32 | 32 | 310 | 81 | 1100 | 950 |
| 121A-36 | 36 | 330 | 85 | 1300 | 1150 |
| 121A-41 | 41 | 350 | 90 | 1500 | 1450 |
