Size: all sizes
Hardness grade: 8.8s,10.9s ,12.9s
materials: made of carbon steel, alloy and stainless steel, aluminum, brass, and other special materials.
Surface finish:zinc plated, HDG, black,plain
Specification: M2,M3,M4,M5,M6,M7,M8
split washer ( fastener,washer)
If you send me drawing or samples,we can meet your request
we made kinds of fastener for 20 years.