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![1/2.20 UNF Thread Caliper Gauge Go / NoGo 1/2x20](https://images.findtheneedle.co.uk/findtheneedle/products/17098188.jpg)
Specification
Knife edge thread calipers
go & nogo conform to 2A.
Part Number ES-4164
For more information on 1/2.20 UNF Thread Caliper Gauge Go / NoGo 1/2x20 talk to JLS Supplies Ltd
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