4140 Steel cylinder head bolt for 1939 – 1941 Cadillac V8. One of two types of cylinder head bolts used on the car. Heat treated to grade 8 condition for maximum wear resistance and durability.
Material: 4140 Steel, heat treat grade 8
Finish: Natural
Thread: 7/16-14
Thread length: 1.100
OAL: 2.625
Hex: .6875
Length under head: 2.296
Head height: .321
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