Cast Pipe Fitting Hex Locknut, Nickel Plated Copper Female Thread Lock Nut for Fixed
$17.99
What will I get? The hex lock nut, provides here, is in size of: Screw Type: NPT; Thickness: 4.5mm /0.18"; Thread Size: NPT1-1/4; Width Across Flat Size: 45mm /1.77". What is this?