JBO Thread Ring Gauge (NoGo) - UNJF - Left Hand - 2A - 5/16 x 24 Endmill25 Tolerance & standard: D =

Tolerance & standard: D = ISO H5 tolerance

The W coating provides enhanced wear resistance and machining stability

Built for machinists and fabrication shops that demand consistent bore quality

Achieve precision in manual hole finishing with the Toolex Hand Reamer

offering tight internal radii and deep-pocket reach in a compact form

JBO Thread Ring Gauge (NoGo) - UNJF - Left Hand - 2A - 5/16 x 24 Endmill25 Tolerance & standard: D =The JBO Thread Ring Gauge (NoGo) is a precision inspection tool built to verify external threads to UNJF specifications. Sized for 5 16 x 24 left handed threads and class 2A, this gauge is ideal for manufacturers, quality teams, and maintenance technicians who need fast, reliable confirmation that threaded components will mate correctly. Crafted from hardened steel, the gauge combines durability with measurement accuracy to handle everyday shop use.