JBO Thread Ring Gauge (NoGo) - UNC - Left Hand - 2A - No. 3 x 48 4 Month Widin this reamer delivers longer tool

this reamer delivers longer tool life and better heat resistance in demanding materials

This intermediate reamer is suitable for engineers

A straight shank provides secure seating in standard hand reamers and reaming bars

Durable carbide construction: Intermediate precision carbide (k10) provides long tool life and consistent hole size in demanding materials

Long and Extra-Long Reach (6 mm x 51 mm): Extended lengths give you access to deep pockets

JBO Thread Ring Gauge (NoGo) - UNC - Left Hand - 2A - No. 3 x 48 4 Month Widin this reamer delivers longer toolThe JBO Thread Ring Gauge (NoGo) is a precision tool designed to verify external UNC threads on lefthand components. Sized No. 3 x 48 with a 2A tolerance, it helps inspectors in manufacturing, automotive, and aerospace confirm that threads conform to Unified standards. The NoGo design provides a clear pass fail indication for nonconforming threads, supporting proper fitment and reliable performance. Crafted from hardened steel, this gauge withstands