Comparison : Item # CK-25-20-375, Collar Stud (CK), 1/4-20
Item # CK-3125-18-375, Collar Stud (CK), 5/16-18
Item # CK-375-16-375, Collar Stud (CK), 3/8-16
Item # CK-5-13-5, Collar Stud (CK), 1/2-13


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