M3 M4 M5 M6 CAP SCREWS HEXAGON SOCKET HEAD ALLEN KEY BOLTS A2 STAINLESS STEEL. M3 COUNTERSUNK ALLEN KEY BOLTS A2 STAINLESS STEEL DIN 7991 BOLT SOCKET SCREWS. Socket Button Head Screws are low-profile, as their rounded head consists of no sharp or pointed edges, thus adding to the safety and aesthetics of the component enhancing its decorative qualities.
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