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ASME B47.1 2007 Edition, 2007
Complete Document
Active, Most Current
Gage Blanks
Includes all amendments and changes through Reaffirmation Notice , 2012
Page Count:148
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This Standard covers standard designs for the following:

(a) plain and thread plug gage blanks to 12.010 in. maximum gaging diameter

(b) plain and thread ring gage blanks to 12.260 in. maximum gaging diameter

(c) involute and serrated spline plug and ring gage blanks to 8.000 in. major diameter

(d) straight-sided spline plug and ring gage blanks to major diameters of 8.000 in. for plugs and 6.000 in. for rings

(e) machine taper plug and ring gage blanks to 5.000 in. gaging diameter

(f) adjustable snap gages to 12 in.

(g) adjustable length gages to any desired length

(h) master disks up to 8.010 in. in diameter

Recommended general designs covering taper plug and ring gages for special applications, flush-pin gages, and flat plug gages are also included.

This Standard is intended to deal only with the dimensions of blanks, frames, and fittings. However, it is expected that gages made from these blanks shall be finished in accordance with accepted good gage making practice with respect to accuracy and workmanship.


(1) While compliance to the revised specifications in this document is urged as soon as possible, the use of blanks and designs in ASME/ANSl B47.1-1988 is permissible for a period of 5 years from approval date of this document.

(2) Types of steel or other material for gage blanks and components are not standardized in this document. The type of material and hardness should be agreed upon by producer and user of the gages.

(3) Certain tables in this document show both nominal thread ranges as well as decimal ranges. In such cases, the decimal range establishes the official dividing line from one blank or handle size to the next.

(4) The following designates correct blank size to use:

(a) thread plugs—go actual major

(b) plain plugs—no go major

(c) thread rings—go actual major

(d) plain rings—go gage/dimensions