M3 M4 M5 M6 COUNTERSUNK BOLTS ALLEN KEY BOLT SOCKET SCREWS A2 STAINLESS DIN 7991

M4 (suitable for 2.5mm wrench). M5 (suitable for 3mm wrench). M3 (suitable for 2mm wrench). Material: 304 stainless steel. Surface: Black coated (electrophoretic black).

eBay