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Small chrome-plated steel thread plug gauge with taperlock handle, M2 by 0.40 mm size

Vermont Gage

Vermont Gage 302104010 Taperlock Thread Plug Gage M2x0.40 measurement tool

SKU CH-Q206-MDAGE

Metric M2×0.40 go thread plug gage in tool steel hardened to RC 70-72 with 6.40 mm gage length and 1.74 mm pitch diameter, supplied with NIST-traceable certificate

  • Tool Steel Rc 70/72 hardness resists wear
  • Go member pitch diameter 1.74 mm verifies thread fit
  • 40 mm Go member length suits M2x0.40 threads
  • ASME B1.16M standard ensures metrological compliance
  • NIST-traceable Certificate of Accuracy validates calibration

Purpose & Audience

The Vermont Gage 302104010 is a taperlock thread plug gauge for checking internal M2 x 0.40 metric threads. It suits quality inspectors and machinists who need to verify pitch diameter on small fasteners.

Decisive Specification

The Go member has a pitch diameter of 1.74 mm and a length of 6.40 mm, hardened to RC 70-72 tool steel. This single dimension determines whether a threaded hole accepts the gauge and passes inspection.

Installation & Common Issues

The member-only design fits an existing taperlock handle, so no separate holder is required. Users sometimes force the gauge into damaged threads, which can chip the chrome-plated surface and invalidate the NIST-traceable certificate.

Highlights

  • Tool Steel Rc 70/72 hardness resists wear
  • Go member pitch diameter 1.74 mm verifies thread fit
  • 40 mm Go member length suits M2x0.40 threads
  • ASME B1.16M standard ensures metrological compliance
  • NIST-traceable Certificate of Accuracy validates calibration

Specifications

BrandVERMONT GAGE

Questions about this item

What does the 1.74 mm pitch diameter on the Go member mean when I check a hole?

The 1.74 mm pitch diameter is the functional size the Go member must enter; if the plug passes fully, the internal thread's pitch diameter is at or above the minimum allowed by the 6H tolerance class.

How does the ASME B 1.16M standard limit the use of this gage?

ASME B 1.16M defines the thread form, tolerance class 6H, and acceptance criteria for metric thread plug gages, so this tool verifies compliance with that specific standard only.

What does the Taperlock handle design require for mounting the Go member?

The Taperlock member uses a tapered shank that locks into a matching handle hole; the 6.40 mm Go member length seats against the handle face when fully inserted.

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