Dynabrade 77757 4-1/2" Dia. x 7/8" Center Hole, 40 Grit, Z/A, Type 27, DynaCut Flap Disc W/Fiberglass, 10/pack 
3M 26120, PPS Series 2.0 Adapter, Type S28, 17.5 mm Female, 19 TPI
Thread, 7100135956 
Insize 4120-9, METRIC THREAD RING GAGE, GO, M9x1.25, 6928640341441
$55.47
Go and No-Go gages are supplied separately.
Class 6g.
Standard ISO1502.
Supplied with manufacturer inspection certificate.
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