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Limit thread gauge of gauging system for JIS class
B0251E0252
Major gauges for threads of workpieces.
Gauging system for JIS class. Metric (class 1, 2, 3) Unified, Thread,
Parallel pipe (PF).
Screw this gauge in a worked thread by hand smoothly GP, GR must
go through over the whole length of thread.
Screw this gauge into a worked thread smoothly by hand WP, WR,
IP, IR, shall not be screwed in more than two revolutions included two
revolutions, from either sides.