Nevada Shelby American Automobile Club
Nuts & Bolts
Head Markings
There is much to be learned about the fasteners that hold our cars together.
We will attempt to shed some light on it.
It involves more than just putting in any old bolt that fits to hold that fender on,
that is IF you want it to be done CORRECTLY!
CLASS: Nuts & Bolts 101
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TYPE - Determine the Type of Bolt/Screw
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SIZE - Determine the Size of Bolt/Screw
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FINISH - Determine the Finish on the Bolt/Screw
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HEAD MARKINGS - There are many Head markings, here are a just a few.
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GRADE - Determine what grade Bolt you need or was used and why.
Head Markings
From Left to right, Samples of "Sems", "NL", "lightning bolt" & "G on L" Head Markings
