Washer
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High quality Washer conforming to national standard
Flat pad, mainly stamped out with iron plate, the shape is generally a flat washer, there is a hole in the middle. There is a calculation formula in the Standard Fastener Quality Book published by Standards Press of China. The formula is: weight of 1000 pieces m=0.00785×{3.1416/4× washer height × [square of outer circle diameter - square of inner hole diameter]}
Hebei Dashan produce Flat pad,Spring washer,Tooth shape washer.
Flat pad mainly stamped out with iron plate, the shape is generally a flat washer, there is a hole in the middle. This hole size specification is generally based on customer requirements to determine.