Used as Go/No-Go gage by setting upper and lower limits.
Flatness of anvil: 59_in.
Parallelism between tips and anvil: range 0-1.26″: 118_in,
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Insize 4636-211, BSPT TAPER THREAD RING GAGE_2 - 11 BSPT, 6928640375132
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