M3 M4 Knurled Thumb Screws

M3 M4 Knurled Thumb Screws

The stainless steel thumb screw includes a screw rod, a polished rod and a thumb nut, the polished rod is arranged between the screw rod and the thumb nut, and the outer surface of the thumb nut is composed of an upper surface, an upper transition surface, an outer cylindrical surface, a lower transition surface and a The lower surface is formed, the upper surface is provided with an inner hole, and the screw rod, the polished rod and the thumb nut are all made of stainless steel. 

The outer surface of the thumb nut is all flat or arc surface, which can avoid damage to the human body when the human body touches and collides. When the screw is stuck with fingers and it is difficult to turn it, you can use an Allen screwdriver through the inner hole to move it. 

The thumb screw is made of stainless steel, which is strong and durable, and there is no need to worry about rusting and affecting the appearance for a long time. Stainless steel thumb screws have the advantages of being sturdy, durable and beautiful, and easy to use to protect the human body.

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