3 7/8-4 UN thread ring gauge GO & NOGO 2A US$931
3 7/8-4 UN thread ring gauge GO & NOGO 2A with long form calibration certificate US$981
3 7/8-4 UN thread plug gauge GO & NOGO 2B US$441
3 7/8-4 UN thread plug gauge GO & NOGO 2B with long form calibration certificate US$491
Fraction: 3 7/8
Decimal: 3.875
TPI:4
Thread Form: UN
Ring gauges Tolerance: 2A 3A
Plug gauges Tolerance: 2B 3B
3 7/8-4 UNC ring plug gage in stock, can be sent out same day!
RH=right hand LH=left hand both available (Just RH gage in stock, LH need custom production)
- 3 7/8″-4 UNC screw plug gage : taperlock double end with handle
- 3 7/8″-4 UNC screw ring gage : solid
Each gage 100% calibrated with quality assurance.
3 7/8-4 UNC thread gauge calibration certificate
If needed, one long form calibration certificate from professional third party testing lab accredited to ISO/IEC 17025 can be supplied. gaugesools also can provide UKAS certifications if needed. These calibration certificates need extra cost, if clients need them,please tell in advance.
Custom production
If clients need some special 3 7/8″-4 UNC thread gauges, then our custom production service can be provided. Usually plug gauges need ten days to finish, ring gages need two weeks to finish. the 3A, 3B class of fit need custom production, and LH thread gages also need custom production.
About us
gaugestools is a professional manufacturer and supplier of thread ring gages and thread plug gauges,including GO/NOGO, RH/LH(right hand and left hand).We have rich ranges of thread gauges, including UN, Metric, ACME, stub-ACME,BSPP, BSPT, NPT, NPTF, Trapezoidal, and Whitworth etc.
Worldwide shipment，usually taking 3-4 days clients can receive goods. The pictures are just for reference. As too many items in stock,we haven’t taken pictures one by one.
We are committed to providing superior quality with excellent service in short delivery time, We aim to build long-term customer relationships.
How to use 3 7/8-4 UNC ring plug gauge
- GO of thread plug gage : it controls workpiece’s internal thread’s pitch diameter and major diameter’s maximum physical size. plug gage’s GO end should be screwed into the entire length of internal thread of workpiece, otherwise, the workpiece’s internal thread is unqualified.
- NOGO of thread plug gage: it controls workpiece’s internal thread’s single pitch diameter’s minimum physical size. plug gage’s NOGO can be screwed in, but it can’t be screwed in more than three turns. Otherwise, the internal thread is unqualified.
- GO of thread ring gage: it controls workpiece’s external thread’s pitch diameter and minor diameter’s maximum physical size. ring gage’s GO end should be screwed into the entire length of external thread of workpiece, otherwise, the workpiece’s external thread is unqualified.
- NOGO of thread ring gage: it controls workpiece’s external thread’s single pitch diameter’s minimum physical size. ring gage’s NOGO can be screwed in, but it can’t be screwed in more than three turns. Otherwise, the external thread is unqualified.
Check the full range of UNC thread gage in stock
payment
We accept payment of T/T(bank transfer), Paypal, Credit Cards, and West Union etc.
