hex bolts and hex nuts (drywall screw)
Category: Cutting Hand Tools (incl. Saws, Shears, Trimmers)
1)low-carbon steel Q235 class(mechanical property):4.8,5.8,8.8,10.9,surface treatment:Zinc plated,hot dip galvanized,black,plain
2)stainless steel AISI 304(A2),AISI 316(A4),AISI 200,AISI 201
Size...