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Vermont Gage 9/16"-18 UNF Go/No-Go ring gage, tool steel, uncoated finish

Vermont Gage

Vermont Gage 361144550 9/16"-18 UNF Go/No-Go Ring Gage Tool Steel

SKU CH-9JMW-051B2

Go/No-Go ring gage verifies 9/16"-18 UNF threads with .525/.5205 in pitch diameters in hardened tool steel RC 60-62

  • Go/No-Go inspection for 9/16"-18 UNF threads
  • Tool steel construction hardened to RC 60-62
  • Adjustable design fits compatible 4T holder
  • Go member pitch diameter .525 in, No-Go .5205 in
  • Uncoated finish for direct thread verification

Vermont Gage 361144550 9/16"-18 UNF Ring Gage

The Vermont Gage 361144550 is a Go/No-Go ring gage designed for verifying external threads on a 9/16"-18 UNF 2A size. Machined from tool steel hardened to RC 60-62, it provides the wear resistance required for repeated inspection tasks. Quality-control technicians and machinists use this adjustable gage to confirm pitch diameters of .525 in on the Go member and .5205 in on the No-Go member.

Installation and common issues

The gage arrives uncoated and ready for use; no assembly or calibration is required before the first check. Thread the Go member onto the part by hand — it should pass freely — then confirm the No-Go member stops within three turns. A frequent error is applying excessive torque, which can damage both the gage threads and the workpiece.

What to verify before ordering

Confirm the component you are inspecting is cut to a 9/16"-18 UNF 2A thread specification. Ensure your inspection process accepts a long-form calibration certificate absence and an uncoated finish. The adjustable design fits a compatible 4T holder if your workflow requires mounted gaging. This gage does not suit metric threads or other UNF sizes.

Highlights

  • Go/No-Go inspection for 9/16"-18 UNF threads
  • Tool steel construction hardened to RC 60-62
  • Adjustable design fits compatible 4T holder
  • Go member pitch diameter .525 in, No-Go .5205 in
  • Uncoated finish for direct thread verification

Specifications

BrandVERMONT GAGE

Questions about this item

How do I confirm the 9/16"-18 UNF ring gage is within tolerance after setup?

Verify the Go member engages the thread fully and the No-Go member stops within three turns; the Go pitch diameter is .525 in and the No-Go pitch diameter is .5205 in for a 2A class fit.

What comes with the Vermont Gage 361144550 and what must be purchased separately?

The box contains the adjustable Go/No-Go ring gage made of tool steel hardened to RC 60-62 with an uncoated finish; a compatible size 4T holder and a long-form calibration certificate are not included.

Which version of the 9/16"-18 UNF ring gage should I choose for a 2A thread class?

This model 361144550 is the correct choice; it is built to 2A class with Go pitch diameter .525 in, No-Go pitch diameter .5205 in, and a thread length of 9/16 in.

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