Size description: For example, M4-5pcs (D 25mm), thread diameter 4mm, quantity 5 pcs , D=handle head diameter, 25mm.
Screw length: 8mm to 100mm
Application】Widely used for lathe machine, mechanical equipment, instrument and apparatus, food and pharmaceutical industry equipment. It can be used in drill press, lathes, fixture, feather board and fences, and other places where ,is your daily life to replace the tightening screw.