JBO Thread Ring Gauge (GO) - BSF - Right Hand - Medium Class - 3/8 x 20 Die & Mould Collet Chucks This intermediate precision HSS (M2)

This intermediate precision HSS (M2) tool is manufactured to BS 328/4 and supplied by Toolex Ltd

supporting consistent hole size across applications

and keep production moving with less rework

This precision reamer is designed to deliver consistent hole sizes with a smooth finish

JBO Thread Ring Gauge (GO) - BSF - Right Hand - Medium Class - 3/8 x 20 Die & Mould Collet Chucks This intermediate precision HSS (M2)Meet the JBO Thread Ring Gauge (GO) for BSFyour go to tool for verifying external thread diameters on right hand BSF fasteners. Designed for machinists, inspectors, and production teams, it provides fast, reliable GO checks to confirm the 3 8 x 20 BSF size with medium class tolerance is met. Built for daily use in busy workshops, this gauge combines precise dimensions with robust materials to deliver consistent results over time. Go No Go quick