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![6.40 UNF Thread Caliper Gauge Go / NoGo](https://images.findtheneedle.co.uk/findtheneedle/products/17098342.jpg)
Specification
6-40 UNF Knife edge thread calipers
go & nogo conform to 2A.
Part Number ES-4156
For more information on 6.40 UNF Thread Caliper Gauge Go / NoGo talk to JLS Supplies Ltd
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