JBO Thread Ring Gauge (GO) - UNF - Right Hand - 3A - 1 3/8 x 12 Face Mill Arbors - Through Coolant Durable seal design and proper

Durable seal design and proper tooling compatibility: Newer models use a metal nose seal for longer life

Type C1 — is a precision tool-holding accessory designed for axial machining operations

This hand reamer is ideal for machinists and technicians who need accurate taper-pin holes for reliable alignment and strength in joints

repeatable results for precision workshops and job shops

delivering reliable performance across multiple passes and complex geometries

JBO Thread Ring Gauge (GO) - UNF - Right Hand - 3A - 1 3/8 x 12 Face Mill Arbors - Through Coolant Durable seal design and properThe JBO Thread Ring Gauge (GO) UNF is a precision go gauge designed to verify external threads on righthand UNF components. Sized for 1 3 8" diameter with 12 threads per inch and 3A tolerance, its built for machinists, inspectors, and quality teams who need fast, reliable pass fail checks. Crafted from hardened steel with a knurled outer edge, this gauge is ready for everyday use in busy shops and field service environments. Go No Go verification for