Dynabrade 51632 .1 hp Straight-Line Pencil Grinder, Central Vacuum, 1/8" Collet 
Insize 2230-16, EXTERNAL THREAD TAPER MEASURING INSTRUMENT, 8-16″/203.2-406.4mm, 6928640383137
$2,023.22
Dial indicator graduation .001″
Dial indicator stroke .5″
Measure the taper of external thread
Optional accessory: ball points
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