materials
carbon steel or alloy steel
grade guardrail bolts
4.6 4.8,6.8, 8.8,10.9,12.9 or grade 2,5,8,10
finish guardrail bolts
Plain, black, zinc plated, H.D.G
Length guardrail bolts
35,50,150,170mm or 1 1/4"
shape
Round head oval neck
Technique guardrail bolts
Heading
Product Grade guardrail bolts
A