JBO Thread Ring Gauge (NoGo) - UNC - Left Hand - 2A - 1 1/2 x 6 NCDC Drill Chuck and detailed pocket or groove

and detailed pocket or groove finishing

The carbide construction provides exceptional wear resistance for ferrous and non-ferrous alloys

and hobbyists working with aluminum and other non-ferrous metals

Its 4-flute tapered neck provides stability and consistent performance when machining inclined geometries

consistent countersink is required

JBO Thread Ring Gauge (NoGo) - UNC - Left Hand - 2A - 1 1/2 x 6 NCDC Drill Chuck and detailed pocket or grooveThe JBO Thread Ring Gauge (NoGo) for UNC left hand threads is a precision inspection tool built to verify external thread diameters with speed and confidence. Designed for use in manufacturing, automotive, and aerospace environments, it provides a straightforward go no go check to confirm thread conformity and proper fitment. This gauge is specifically tailored to UNC 2A left hand threads in the 1 1 2 x 6 size, delivering accurate, repeatable readings