grade4.8 、carbon steel 、blue zinc/yellow zinc 、all sizes 、full threaded
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grade4.8 、carbon steel 、blue zinc/yellow zinc 、all sizes 、full threaded
hexagonal bolt size:M5-M56 length:10mm-300mm grade:4.8/8.8/10.9/12.9 material:carbon steel/35K/40Cr etc surface:plain,zinc,black,HDG,ect.
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