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Oval Head Machine Screw

Oval Head Machine Screw

The head is curved, its top is slightly exposed after installation, and it is beautiful and smooth, generally used on instruments or precision machinery.
 
Cylindrical Head Machine Screw

Cylindrical Head Machine Screw

The nail head has high strength, and the shell is used in common parts connection.
 
Machine Screws

Machine Screws

A screw assembled inside a threaded hole is a connection between a part with a head with a female threaded hole, and a part with a through hole.