we have rich experiences with 15 years on Fastenersin ningbo city.which produce high quality bolt/nut which are used in atuomobile and construction.We have 10 sets cold fordging machine,and with our full set tesing machine.Standard :DIN,GB,ISO,JIS ETC。 GR:4.8 8.8 10.9 12.9
High tensible bolt:A325 A325M A490 B16 B7 High tensible nut: A563 A563M 2H
Standard bolt:DIN933 DIN931 DIN6923 DIN603 DIN912
Standard nut:DIN934 DIN6923 DIN 6330
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