DIN 912 hex socket screw with cylindrical head in A4-80 acid-resistant stainless steel. Hex screw CH A4 stainless steel (fastening / screws with inner hexagon / cylindrical head socket screws CH). Principal data: thread diameter M4, length 30 mm, indicative package size 500 pcs, nominal thread length 20 mm. Supplied under manufacturer part number 80912040306, EAN 5711160872448, HS code 7318.29, country of origin Germany.