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Shoulder bolts, Alloy steel black oxide finish, 4-1/4"

Shoulder bolt diameter is measured on the machined shoulder. Thread diameter is measured on the outside of the threads.

Shoulder bolt diameter

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Shoulder bolts, Alloy steel black oxide finish, 4-1/4"
Shoulder diameter 1/2" shoulder (3/8"-16 thread) 5/8" shoulder (1/2"-13 thread) 3/4" shoulder (5/8"-11 thread) 1" shoulder (3/4"-10 thread)