DIN 912 Hex Socket Screw Cylindrical Acid-Resistant A4-80. Hex screw CH A4 stainless steel within Fortification, Screws with inner hexagon, Cylindrical head socket screws CH. Principal data: thread diameter M16, length 120 mm, indicative package size 25 pcs, nominal thread length 44 mm. Supplied under manufacturer part number 80912161206, EAN 5711160873322, HS code 7318.29, country of origin Germany.