1) Differents size:M3 to M64 5/32- 2"
2) Standard:GB,DIN,ANSI,JIS
3) Finish:plain,black, yellow zinc, white zinc, white blue zinc, and phosphating
4) Grade:4.8 5.8 6.8 8.8 10.9 12.9
5) Material:carbon steel, brass,stainless steel, spring steel, alloy steel
6) Packing:Paper carton
7) Certification: ISO9001-2008
8) Special fasteners can be supplied according to customers' drawings or samples