M3 M4 M5 M6 M8 BUTTON HEAD SCREWS HEX ALLEN KEY SOCKET BOLTS 10.9 HIGH TENSILE
Allen key size: 2mm. Button head screws with allen key socket. Allen key size: 2.5mm. Button Head Screws. Allen key size: 3mm. Allen key size: 4mm. High tensile steel grade 10.9. Allen key size: 5mm.