construction industry. read more high strength fasteners fasteners for petrochemical industry, wind powerindustry, and construction industry. read more product categories company company nuts ◆ astm a194 heavy hex nuts: 2h, 2hm,7,7l 7m, 4，4l,6，8/8a,8c/8ca,8m/8ma,8t/t8ta. ◆ astm a563/a563m heavy hex nuts: dh, a, c, 8s, 10s, 10, 12. ◆ as 1252 / 1112 structure nuts: class 8, 10. ◆ jis 1186/1181 heavy hex nuts: class f8t, 10t, 8, 10. ◆ iso 4032 hex nuts: class 8, 10, 12. ◆ din 934 / 6915 hex nuts: 8, 10, 12. ◆ en 14399 heavy hex nuts: class 10. ◆ uni 5587 hex nuts: class 8, 10. ◆ gb 1229 structure nuts: class 8, 10. ◆ gb 6170 hex nuts: class 8,10 studs,thread bar,tapping/double end studs ◆ astm a193/a320 alloy steels: b7, b7m, b16, l7, l7m, l43 ◆ astm a193/a320 stainless steels: b8, b8m, b8t (class 1 and class 2)