The JBO Thread Plug Gauge helps you streamline thread inspections
Its straight shank and specialized flute geometry deliver consistent diameters and smooth finishes in demanding applications
Long-reach carbide construction: The extended length enables deep milling and access to complex geometries
high‑quality results with less operator intervention
repeatable holes in critical assemblies
JBO Thread Ring Gauge (NoGo) - UNF - Right Hand - 2A - 5/16 x 24 Face Mill Arbors - Through Coolant The JBO Thread Plug GaugeJBO Thread Ring Gauge (NoGo) is a precision tool designed to verify external thread diameters to Unified standards. Its ideal for quality control teams, machinists, inspectors, and workshop technicians who need reliable, fast checks on threaded components. Specifically, it covers the UNF, right hand 5 16 x 24 threads, with a NoGo design that helps you quickly identify non conforming parts. No Go design for fast, at a glance inspection: The NoGo