Plug Gage Master: Taperlock, Trilock & Wire

GO/NO GO plug masters in wire, taperlock and trilock styles, lapped and certified.

Sizes: .015" to 12.010" (0.38 to 305.05 mm)
Part number: PGM-[class]-[material]-[size]
Example: PGM-XX-S-.7500

Priced by size in the online configurator

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Dual Master or Single Master tooling

Plug gage masters check bores and air plugs. Each member is lapped to size; GO members carry plus tolerance and NO GO members minus. The size decides the style, or you can name the one you want.

Styles and sizes

Style	Size range	Notes
Reversible wire	.015″ to 1.010″	All members 2″ long; steel, chrome from .0301″
Taperlock	.1501″ to 1.510″	Members lock into a tapered handle; steel, chrome on request
Trilock	.760″ to 12.010″	Trilock handle for larger sizes; steel, chrome up to 1.510″

Extra lengths and depth steps are available.

How to order

PGM – class – material – size. Class XX or X, material S (steel) or C (chrome). Add -DEH for a double-end handle and -MM for metric sizes. Example: PGM-XX-S-.7500.

Certification

Every master ships with a long-form certificate of calibration showing the actual measured size, traceable to NIST. Calibration is done in a temperature-controlled lab conforming to ISO/IEC 17025 and ANSI/NCSL Z540-1.

How many masters?

Dual Master air gaging takes two masters, one at each end of the tolerance. Single Master takes one, at nominal. For best results with a single master, pick a size near the middle of the part tolerance.