3material: steel, carbon specification astm a36, 1.50 sq stock; o/a 3.000 in. Lg; one end 1.312-12un-3a full thread priorto machining groove; item contains one hole .438 x 1.00 deep, .250-18nptf; item contains one hole .44 x 2.62 deep csk 90 degrees to .500