... 2.Material:Carbon Steel3.Size:M3-M100;1/4"-4"4.Certificate:ISO9001:20081.What’s the specification of ... DIN 931 bolt supplier2.standardDIN, ASME,JIS,BS,FR and GB,Nonstandard bolt(according to your order ... hot dipped galvanized,daromet etc6.SizeM3-M100;1/4"-4"7.Supply ability3000 tons per month8.CertificateISO9001: ... -standard fasteners including DIN,ASME,ISO,BS,JIS,FR and GB. PROMPT DELIVERY: To meet client ...