1 1/2 inch standard length. The integral socket head on these fully threaded 5/16 inch-18 carburetor studs facilitates removal and installation. Kit contains four black plated studs with zinc plated studs with zinc plated hex nuts and flat washers. Product Features:This stud has a black oxide coatingFine threads on one end fits most intakesBullet nose makes carb installation easyHas zinc coated nuts and washers