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Silver metal ring gauge with knurled edges and threaded interior

Vermont Gage

Vermont Gage 361122550 Ring Gage #12-24 Tool Steel measurement tool

SKU CH-757R-REC45

Checks #12-24 UNC threads with adjustable tool-steel Go/No-Go ring gauge at 0.1879 in and 0.1845 in pitch diameters

  • Precision thread verification with #12-24 UNC Go/No-Go pitch diameters .1879 in and .1845 in
  • Durable tool steel construction hardened to RC 60-62 for extended gauge life
  • Adjustable gauge design fits compatible 1T holder for secure setup
  • 3/16 inch thread length suits standard #12-24 inspection requirements
  • Uncoated finish preserves dimensional accuracy on 2A class threads

Thread Size #12-24 UNC

This Vermont Gage ring gauge checks external threads on #12-24 UNC fasteners. It is made from tool steel hardened to RC 60-62 for wear resistance. The adjustable design allows the go and no-go members to be set precisely. It fits compatible holder size 1T for convenient handling.

For Machinists Verifying 2A Class Threads

Quality inspectors and machinists use this gauge to confirm pitch diameter compliance on class 2A parts. It does not suit users who need a long-form calibration certificate included with the tool. Buyers requiring metric thread verification or different thread classes should select another gauge.

Go Pitch Diameter .1879 Inch

The go member accepts threads at or above .1879 inch pitch diameter while the no-go member rejects threads exceeding .1845 inch. This single limit pair determines whether a #12-24 UNC thread passes class 2A tolerance.

Highlights

  • Precision thread verification with #12-24 UNC Go/No-Go pitch diameters .1879 in and .1845 in
  • Durable tool steel construction hardened to RC 60-62 for extended gauge life
  • Adjustable gauge design fits compatible 1T holder for secure setup
  • 3/16 inch thread length suits standard #12-24 inspection requirements
  • Uncoated finish preserves dimensional accuracy on 2A class threads

Specifications

BrandVERMONT GAGE

Questions about this item

Does the #12-24 ring gauge generate any noise or heat during continuous use?

No, the Vermont Gage 361122550 is a passive Tool Steel measurement tool with no moving parts, so it produces no noise, heat, or power draw when checking threads all day.

What holder does the buyer need to mount this #12-24 gauge?

The gauge is designed for a compatible 1T holder, which must be supplied separately to secure the adjustable ring during inspection.

Can the .1879 go and .1845 no-go members verify threads cut to older 2A class specs?

Yes, the gauge is manufactured to Thread Class 2A with those pitch diameters, so it will accept or reject legacy 2A threads exactly as current 2A threads.

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