Off The Wall
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Joined: Aug 2008
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From: Tuscumbia , Al
Off The Wall
I know this is not the right place to post this but 
.... My 78 F150 has hex head bolts with 7 marks what grade is this ?? 6 would be grade 8 . never seen this before anyone got a clue 
I searched the net and still no idea !!
.... My 78 F150 has hex head bolts with 7 marks what grade is this ?? 6 would be grade 8 . never seen this before anyone got a clue I searched the net and still no idea !!
Hotshot
Joined: Feb 2003
Posts: 11,537
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From: Long Beach, Ms.
Here are the grade markings recognised by the fastener industry; American Fastener - ASTM, SAE, and ISO Grade Markings
I've never seen a bolt marked with 7 lines. where are they used on your truck?
I've never seen a bolt marked with 7 lines. where are they used on your truck?
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