WELLBO specially provide high tension hex nuts
eqv ISO 4032:1999
size scope:M10-M100(3/8-4")
Material:carbon steel
item as per ISO898:4-12:A194/A /A194M:2.2H,2HM,3,4,6,7,7m,16;ASTM A563,A563M
Stainless steel
items per IS03506：A（50-80),A4(50-80),C1，C3;ASTM A194/A194M:8.8A,8M,8MA,8T,8TA;ASTM F593/F593M
