1/4x20 BSW Screw Ring Thread Gauge Go or NoGo whitworth
Specification BSW Ring Gauge Option of Go or NoGo gauges 1/4" BSW Ring gauges comply to BS 84, BS 919 Part 2 Part Number ES-3922Visit the JLS Supplies Ltd website for more information on 1/4x20 BSW Screw Ring Thread Gauge Go or NoGo whitworth