JBO Thread Ring Gauge (GO) - BSF - Right Hand - Medium Class - 3/8 x 20 Die & Mould Collet Chucks repeatable measurements that help you

repeatable measurements that help you lock in quality

2 mm on this size — lets you tailor profiles to your mold or die features

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

Long Shank for Deep Grooves: Offers extended reach and improved rigidity in deep cavities

Hardened steel construction with wear-resistant finish: Built to withstand daily use

JBO Thread Ring Gauge (GO) - BSF - Right Hand - Medium Class - 3/8 x 20 Die & Mould Collet Chucks repeatable measurements that help youMeet 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