UN thread ring & plug gauges supplier
UN thread gauge is Unified Constant Pitch thread gauge
GO & NOGO, RH(ring hand) & LH(left hand) available
From 5/16-6″ many standard sizes in stock, can keep the next days delivery.
Standard tolerance: Plug 2B & ring 2A
Internal thread tolerance class: 1B、2B、3B;
External thread tolerance class: 1A、2A、3A
For special gauge without stock, we can provide special custom production service, one pc is also acceptable,
We have as below standard sizes’ UN screw plug gages and screw ring gages in stock.
We accept payment of T/t (bank transfer), Paypal and Credit card.
We usually send goods by express, DHL or UPS.