3M 14215, Roloc Disc Pad TS and TSM, Medium 3 in 1/4-20 Internal, 7000119310 
Insize 4794-040, 90? TOOL MAKER SQUARE, 1.6×1.1″, 6928640317569
$50.60
DIN875 grade 00.
Beveled edge for inside measurement.
Made of hardened stainless steel.
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