Truthread UN (UNC/UNF/UNEF) Ring Gauges GO 2A

The Truthread UN (UNC/UNF/UNEF) Ring Gauges GO 2A are precision measuring tools used for inspecting the external threads of threaded shafts or fasteners. These ring gauges are specifically designed to conform to the Unified National Coarse (UNC), Unified National Fine (UNF), and Unified National Extra Fine (UNEF) thread standards. The GO designation indicates that these gauges are used to verify if the external threads of the tested part are within acceptable tolerances. The 2A tolerance class ensures high accuracy and reliable measurements, allowing users to quickly determine if the threads meet the required specifications. These ring gauges have a circular shape with threaded holes that match the desired thread size and pitch.

  • Stars


When can I get next day delivery?

If you live in the UK, you can get next day delivery if you order before 4:50pm Monday - Friday. 

You can also qualify for Free Next Day AM Delivery if you spend over £100 & order before 4:50pm!

Saturday delivery is also available if you order before 4:50pm on a Friday.

Please note: If an item is out of stock, please try and order before 3:30pm to ensure you get the product in the time frame displayed.


Can I return an item?

If you have received an item which is defective, please let us know within 14 days to receive a correct alternative or a credit in full.

Returned goods that are not defective will be subject to a 20% return handling charge being deducted from the original purchase price. Goods must be returned within 14 days of the original purchase date or no credit will be offered.

Please see our Returns Policy for more details.