M4 pure copper cup-head hex socket screws (7mm head diameter, 4mm head thickness) (sold in packs of 50) M415

1、The male thread has uniform pitch, clear texture, high bite and firmer 2、Cap hex socket screw come with smooth surface, not easy to rust 3、The screw is composed of pure copper material with strong wear resistance 4、Contain 12 different sizes of screws to meet your different fastening requirements 5、Cap screw have stable structure, excellent performance and long service lifeItem Type: Cap Hex Socket Screw Material: Pure copper 50 x Cap Hex Socket Screw