UNF thread plug gaugeUNF thread ring gauge

UNF thread ring gages and plug gauges manufacturer & supplier

UNF thread gauge is UNIFIED  NATIONAL FINE thread gage with 60 degree thread angle.

GO & NOGO, RH(ring hand)  & LH(left hand) available


Standard tolerance: Plug 2B &  ring 2A

Internal thread tolerance class: 1B、2B、3B;

External thread tolerance class: 1A、2A、3A

For special gauges without stock, we can provide special custom production service,  one pc is also acceptable,

Big stock of as below standard sizes:

1/4-28 UNF 5/16-24 UNF 3/8-24 UNF  7/16-20 UNF
1/2-20 UNF 9/16-18 UNF 5/8-18 UNF 3/4-16 UNF
7/8-14 UNF 1-12 UNF 1 1/4-12 UNF 1 3/8-12 UNF
1 1/2-12 UNF

We 100% be sure gauges’s quality, when clients received goods, if found any not well, clients can give back to us, we will undertake all the loss including shipping cost .

We accept payment of T/T (bank transfer), Paypal and Credit card.

We usually send goods by express, DHL or UPS.