JBO Thread Ring Gauge (NoGo) - UNJF - Right Hand - 3A - No. 4 x 48 G 99 mm reamer features a

99 mm reamer features a left-hand spiral flute and right-hand cutting

helping inspectors quickly separate compliant parts from rejects and keep production moving

you gain reliable performance across multiple materials

This reamer is designed to be produced to order

delivering stable operation in demanding workshop environments

JBO Thread Ring Gauge (NoGo) - UNJF - Right Hand - 3A - No. 4 x 48 G 99 mm reamer features aJBO Thread Ring Gauge (NoGo) UNJF Right Hand 3A No. 4 x 48 is a precision tool for verifying external thread diameters against the Unified Thread Standard. Designed for technicians, inspectors, and machinists in manufacturing, automotive, and aerospace, it helps confirm that threaded components meet exact size and form requirements before assembly. Featuring a NoGo design for clear pass fail assessment and a hardened steel body, this gauge delivers