Cadmium plated hardened steel hex bolt. Made to prewar specifications with a smaller head size. Suitable for many applications.
Material: 4140 Steel, heat treat grade 8
Finish: Cadmium
Thread: 1/4-28
Thread length: .953
OAL: 1.590
Length under head: 1.375
Hex: .4375
Head height: .215
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