3M 20921, PSA Cloth Disc 348D, 80 X-weight, 1-1/2 in x NH, Die 150S, 7010299967 
3M 81356, Venture Tape White Aluminum Foil Tape 1558HT, 72 mm a 45.7 m, 5.4 mil, 7010335933 
Insize 7382-19, 3-WIRES, .0209″/0.530mm, 6928640361784
$326.56
Used with standard outside micrometers with spindle .25″DIA to measure pitch diameter of screw threads.
Diameter accuracy: ?20_in. Cylindricity: 39_in.
Hardness: HRC60.
Supplied with manufacturer inspection certificate.
Related products
Paint Preparation
3M 26120, PPS Series 2.0 Adapter, Type S28, 17.5 mm Female, 19 TPI Thread, 7100135956
$27.52
Paint Preparation
3M 26130, PPS Series 2.0 Adapter, Type S35, 16 mm Female, 1.5 mm Thread Stretched, 7100135926
$27.52
$27.52