NPSM 1/4″ thread gage-1/4-18 NPSM ring plug gauge

1/4" NPSM thread gage

NPSM 1/4″ thread gauge

1/4-18 NPSM ring plug gage

  • DEC. : 0.25
  • Frac.: 1/4″
  • TPI: 18

In stock, can be sent out the next day.

Class of fit: ring gage 2A; plug gage 2B

Each 1/4″ NPSM thread gage 100% calibrated with quality assurance.

RH=right hand  LH=left hand both available

NPSM 1/4″ thread’s basic size

Diameter: 1/4  D(Pipe O.D.): 0.540  n=18  es=0.0013

2A external thread  Major dia.: max 0.526 min 0.517  Pitch Dia.: max 0.4903  min 0.4859

2B internal thread  Minor dia.: min 0.468 max 0.481  Pitch Dia.: min 0.4916   max 0.4974

1/4-18 NPSM 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 certificates and NIST certificates if needed.These calibration certificates need extra cost, if clients need them,please tell in advance.

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, NPSM, Trapezoidal, and Whitworth etc.

The 1/4″ NPSM thread gauge produced according to ANSI/ASME B1.20.1

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, If clients need  actual goods’s pictures, we are happy to take.

Check the full range of NPSM thread gage in stock

NPSM 1/4" thread gage1/4-18 NPSM ring plug gauge