1/2 BSW Steel Hex Full Nut BZP Zinc-Plated. BSW - conform to BS 1083. UNC - conform to BS 1768. MPN: 5050420049740 EAN: 5050420049740 1/2 BSW Steel Hex Full Nut BZP Attributes: Driving Features: Hexagon Grade: 8 Material: Steel Surface Treatment: Zinc Plated Thread: BSW Thread Size: 01-Feb