1.3/8x6 BSW Thread Caliper Gauge Go / NoGo whitworth

Specification Knife edge thread calipers go & nogo 1.3/8" BSW (BS 84, BS 919 Part 2) Part Number ES-4201

For more information on 1.3/8x6 BSW Thread Caliper Gauge Go / NoGo whitworth talk to JLS Supplies Ltd