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The straight shank and stub length simplify setup in standard toolholders
this GO gauge delivers exceptional durability in busy workshops
yielding superior surface finishes and tighter tolerances
Exacting DIN 212-B tolerance: Achieves precise 9
Made from high-speed steel (M2) and finished for reliable hand reaming
JBO Thread Ring Gauge (GO) - UNF - Right Hand - 3A - 1/2 x 20 NCDC Drill Chuck The straight shank and stubThe JBO Thread Ring Gauge (GO) for UNF, Right Hand, 3A, 1 2 x 20 is a precision inspection tool designed to quickly verify external thread diameters and conformity to UNF standards. Suitable for engineers, machinists, quality teams, and maintenance professionals, it streamlines the process of confirming that threaded components meet exact size and tolerance requirements. Constructed from hardened steel, this GO thread ring gauge delivers durable, long
