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■ Aluminium Bronze Alloy and Beryllium Copper Alloy
■ Q/ZBF-131D Precision Casting
■ Hexagonal head design increased the contact area with fasteners and firmly grip.
| Number | mm | Kmax mm | Be-Cu g | Al-Cu g |
131D-1002 131D-1004 | 250 350 | 30 50 | 1250 1785 | 1130 1620 |
