JBO Thread Ring Gauge (NoGo) - UNJC - Right Hand - 3B - No. 4 x 40 Die & Mould Collet Chucks Shank type: Straight shank for

Shank type: Straight shank for compatibility with standard collets and tooling holders

The left-hand spiral flute facilitates efficient chip evacuation in suited applications

Exact GO verification for metric coarse threads (M42 x 4

17 mm precision: ensures tight

while the left-hand spiral flute and right-hand cutting orientation optimize chip removal and surface finish

JBO Thread Ring Gauge (NoGo) - UNJC - Right Hand - 3B - No. 4 x 40 Die & Mould Collet Chucks Shank type: Straight shank forThe JBO Thread Ring Gauge (NoGo) is a precision tool designed to verify external thread diameters to UNJC standards. Its an essential instrument for manufacturing, automotive, and aerospace environments where quick, reliable thread checks matter. The NoGo design makes non conforming threads easy to spot, helping you prevent incorrect assemblies and reduce rework on the shop floor. Designed for right hand threads and sized as No. 4 x 40 with a 3B