ISO7380 BUTTON HEAD TORX SCREW NYLOK PATCH LOCTITE 1.carbon steel meet grade 4.8/8.8/12.9 2.size:m4-m12 3.phosate 4.Loctit ISO7380 BUTTON HEAD TORX SCREW NYLOK PATCH LOCTITE1.carbon steel meet grade 4.8/8.8/12.92.size:m4-m123.phosate,other finish are available4.Loctite patched,others patch as you like. ISO7380 BUTTON TORX SCREW NYLOK PATCH LOCTITE