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Chrome-plated steel thread plug gauge with Taperlock handle, 1/4-20 UNC Go member

Vermont Gage

Vermont Gage 301126010 Taperlock Thread Plug Gage 1/4"-20 measurement tool

SKU CH-7J82-QH5DX

Chrome-plated tool-steel Go plug gauge with 0.2175 in pitch diameter for 1/4"-20 UNC threads, hardened to RC 70-72 and supplied with NIST-traceable certificate

  • Precision thread verification with Class X tolerance
  • Hardened tool steel at RC 70-72 resists wear
  • Chrome-plated finish protects against corrosion
  • NIST-traceable Certificate of Accuracy included
  • Go member pitch diameter .2175 in meets ASME B 1.2

Thread plug gauge for 1/4"-20 UNC

The Vermont Gage 301126010 is a taperlock thread plug gauge designed to verify internal threads cut to 1/4"-20 UNC Class 2B or 3B. It is built from tool steel hardened to RC 70-72 and finished with chrome plating for wear resistance. Quality engineers and machinists use the go member to confirm that a tapped hole meets the minimum pitch diameter of .2175 in.

Thermals noise and power

As a purely mechanical inspection tool, the gauge generates no heat, produces no noise and draws no electrical power during use. There are no active components, cooling requirements or energy ratings to consider. The only physical demand is the light torque needed to engage the go member by hand.

Replaces worn or missing go members

This gauge replaces a lost, damaged or out-of-tolerance go member in an existing taperlock handle set for 1/4"-20 UNC threads. The upgrade is worthwhile when a current gauge no longer holds the X tolerance class or its certification has expired. It does not supply a no-go member, so shops needing full go/no-go inspection must source the mating piece separately.

How it compares

Measured against everything we stock in Meters, Testers & Measuring Tools, at today’s prices. Recalculated every night.

Price $36.99
Cheaper than about 60% of the 3,030 comparable items (median $54.99).

Specifications

Product
Brand nameVERMONT GAGE

Questions about this item

How do I install the 301126010 Taperlock thread plug gage and what step is commonly missed?

Screw the 1/4"-20 UNC go member into the Taperlock handle until it seats firmly; the step often missed is verifying the 0.2175 in pitch diameter engages fully without forcing the RC 70-72 tool steel.

What maintenance or replacement will the 301126010 gage need over time?

Periodically clean the chrome-plated threads and re-check the go member against the certificate of accuracy; replace the member if wear moves the pitch diameter outside the class X tolerance.

What limit appears first when the 301126010 gage is used continuously?

The RC 70-72 hardness resists wear, but the class X tolerance on the 0.2175 in pitch diameter is the first limit reached under sustained gauging cycles.

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