... ,zinc,hdg,oxide 4.iso rohs approve hex head bolt 1. Standard:DIN931/933, DIN558/601; DIN6914, ... Alloy steel, stainless steel. 3. Grade of hex head bolt:Metric standard: Grade4.6, Grade 4.8, Grade5.6, ... standard: Grade2, Grade5, Grade8, B7. 4. Dimension :Metric size from 4mm-72mm, Inch size from 1/8"-2 ... black, DACRO, etc. 7. Packing of hex head bolt:General packing: 15-25Kg per Carbon or Bag, approx ...