Standard thickness finished 18-8 hex nuts, UNC/USS (Coarse) thread, the mostly widely used stainless nut installed with a wrench or socket. Good corrosion protection, 1/4"-20 thru 2 1/2"-4.

Standard thickness finished 18-8 hex nuts, UNF/SAE (Fine) thread, the mostly widely used stainless nut installed with a wrench or socket. Good corrosion protection, 1/4"-28 thru 1"-14.

Standard thickness finished 316 hex nuts, UNC/USS (Coarse) thread, the mostly widely used stainless nut installed with a wrench or socket. BEST corrosion protection, 1/4"-20 thru 2 1/2"-4.

Standard thickness finished 316 hex nuts, UNF/SAE (Fine) thread, the mostly widely used stainless nut installed with a wrench or socket. BEST corrosion protection, 1/4"-28 thru 1"-14.