3M 55658, Stikit Film Disc w/Tab 375L, P320, 5 in x NH, Die 500X, 7100106616, 250 per case 
Insize 7382-12, 3-WIRES, .0077″/0.195mm, 6928640361715
$321.46
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.
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