Toolmaker's Machinist Beveled Edge Square 100x60mm GRADE 1 USSR Lot 1pcs.

Description

100% Original Made USSR!
The description and use angle calibration UL:
Angles calibration UL are intended for control of deviation from mutually perpendicular arrangement of details at Assembly of products, at control or marking of angles of 90°, for check of accuracy of machines. Straight-sided triangles UL is equipped with insulating pads.
The hardness of the working surfaces of the squares is not lower than HV 655, the roughness of the measuring and supporting surfaces is not lower than 12 and 11 purity classes, respectively.
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