3M 26008, PPS Series 2.0 Adapter, Type S7, 3/8 Female, 18 Thread NPS,
4 per case 
Insize 7382-111, 3-WIRES, .0285″/0.725mm, 6928640361807
$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.
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