M2 M2.5 M3 M4 M5 ALLEN KEY GRUB SCREWS CUP POINT SCREWS A2 STAINLESS DIN 916. 5mm HALF LOCK NUTS THIN HEXAGON HALF LOCK NUT A2 STAINLESS STEEL DIN 439. These engineering components have a vast variety of applications, and are appropriate for both light and heavy duty uses.
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