3M 76624, Roloc Disc 777F, 60 YF-weight, TR, 1 in, Die R100N, 7000045620 
Insize 7382-16, 3-WIRES, .0132″/0.335mm, 6928640361753
$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
Measuring/ Inspection Instruments
Insize 0120-IM24, INDUCTIVE MOISTURE METER, 0~100%, 6974029776588
$210.88