3M 9450, Disc Pad Holder 917, 7 in x 5/16 in x 3/8 in 5/8-11 Internal, 7000028549 
Insize 2187-32, ADJUSTABLE SNAP GAGE, .98-1.26″, 6928640314407
$161.16
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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