Bolt Grade Mark
Bolt Grade Mark
(OP)
Ran into a bolt that was used on a platform I've been asked to analyze. Attached is a picture of the head of the bolt. Can any of you bolt experts confirm if this is an SAE J429 Gr8 bolt? The standard I have shows the grade 8's have six lines around the perimeter but doesn't have the dots in between the lines.






RE: Bolt Grade Mark
Dik