Used with standard outside micrometers with spindle .256″DIA to measure pitch diameter of screw threads.
Diameter accuracy: ?20_in. Cylindricity: 39_in.
Cylindricity: 1um. Hardness: HRC60.
Supplied with manufacturer inspection certificate.
Supplied with manufacturer inspection certificate.

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Dynabrade 13200 Dynastraight Finishing Tool, .7 HP, Rear Exhaust, 950 RPM
3M 31899, Scotch Packaging Tape 3750-4RD-OS, 1.88 in x 54.6 yd (48 mm x 50 m), 7100247675
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Dynabrade 01497 Collet Insert, 6mm Capacity 