Cast Pipe Fitting Hex Locknut, Nickel Plated Copper Female Thread Lock Nut for Plumbing - Silver
$12.49
What will I get? The hex lock nut, provides here, is in size of: Screw Type: NPT; Thickness: 3mm /0.12; Thread Size: NPT1/2; Width Across Flat Size: 22mm /0.87. What is this?