hex bolts, hex nuts,washers

DIN933

1.Standard:DIN 931,933, ISO 4014, 4017, ANSI B18.2.1, AS 1252
2.metail:Carbon steel,stainless

   Class 4.8, class 8.8, class 12.9, Grade 2, grade 5 and grade 8
   ASTM A193 B7, B7M, B8, B8M and B16,ASTM A354 GRADE BC, BD
   ASTM A320 L7, L7M, ASTM A325, A490, A307, A449, SAE 429

3.Size:M3-M76

4.Surface:plain,zinc plated,black ,hot dip galv.Dacromet
Fluorocarbon (Teflon,Xylan 1424, 1014, 1010 etc) and so on.