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Vermont Gage 361134050 ring gage, 3/8"-24 UNF, tool steel, uncoated finish, adjustable design

Vermont Gage

Vermont Gage 361134050 Ring Gage 3/8"-24 Tool Steel

SKU CH-DFB3-2JT2S

A 3/8"-24 UNF adjustable thread ring gauge in tool steel hardened to RC 60-62 with go/no-go pitch diameters of .3468 and .343 inches

  • Precision go/no-go verification with 0.3468 in and 0.343 in pitch diameters
  • Adjustable design fits 3T holder for secure setup
  • Tool steel hardened to RC 60-62 resists wear
  • UNF 3/8"-24 class 2A threads match spec
  • 7/16 in thread length ensures full engagement

3/8"-24 UNF Go/No-Go Ring Gage

This adjustable ring gage verifies external threads on 3/8"-24 UNF class 2A parts. Made from tool steel hardened to RC 60-62, it provides both go and no-go pitch diameter members in a single tool. The gage uses a long-form design with a 7/16 inch thread length for thorough engagement.

Machinists and inspectors checking 3/8"-24 UNF

Quality teams needing documented calibration will find this gage ships without a long-form calibration certificate. Shops requiring coated surfaces for corrosion resistance should note the finish is uncoated. Users working with metric threads or different Unified thread pitches need a separate gage.

Go pitch diameter .3468 in and no-go .343 in

These two pitch diameters are the acceptance limits for class 2A external threads. The go member at .3468 in must pass freely over the part while the no-go member at .343 in must not. This single specification determines whether the thread meets the 2A allowance and tolerance.

How it compares

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

Price $209.99
Pricier than about 77% of the 3,030 comparable items (median $54.99).

Specifications

Product
Brand nameVERMONT GAGE

Questions about this item

Will the 0.3468 in Go and 0.343 in No-Go pitch diameters wear enough to need recalibration?

Hardened tool steel at RC 60-62 resists wear; periodic verification against a master gauge is recommended to confirm the Go/No-Go limits remain within tolerance.

What stops the adjustable 3/8"-24 UNF ring from losing its setting during repeated inspections?

The locking mechanism on the adjustable holder secures the 7/16 in thread length once the Go and No-Go members are set to 0.3468 in and 0.343 in respectively.

Does the uncoated tool steel generate noticeable heat during all-day thread checking?

Manual gauging produces negligible friction heat; the RC 60-62 hardness and uncoated finish keep the ring at ambient temperature during continuous use.

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