pipe connector brass hex nut Nickle, Chrome plated Size 1/4, 3/8 to 1 inch 15-50mm Pipe connectors brass hex nut1. Metric Sizes M6 to M202. Inch size from 1/4 to 1 inch3. Thread: BSP, NPT, NPSM4. Material as per ASTM5140 Brass, Alloy Steel, 40Cr or 40Mm Steel Steel nut Surface Treatment Options: Chrome, nickle coated Pipe Fittings Brass Hex Nut