3M 45721, Cubitron II Hookit Cloth Disc 947A, 80+ X-weight, 6 in x NH, D/F 6HL, Die 600HZ, 7100113107 
Dynabrade 52861 .4 hp Straight-Line Pencil Grinder, Rear Exhaust, 25,000 RPM, 1/8" Collet 
Insize 7321-T16, SCREW THREAD POINT, 4.5-3.5TPI/5.5-7mm, pair, 6928640348518
$36.65
internal thread (60? thread angle)
SCREW THREAD POINT, 4.5-3.5TPI/5.5-7mm, pair
For use with Screw Thread Microsmeter Series # 3281
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