Ring & Plug Thread Gages  
Call 616 954 6581 for Thread Gages
About Ring & Plug Thread GagesUsed - Surplus Ring & Plug Thread GagesRing & Plug Thread Gage Technical InformationRing & Plug Thread Gage CatalogsContact Ring & Plug Thread GagesBookmark





Effective size

Effective size Per ASME B1.7-2006 Definitions [ back to main page ]

Effective size: see also pitch diameter, functional diameter; the pitch diameter of the pitch diameter of the enveloping thread of perfect pitch, lead, and flank angles, having full depth of engagement, but clear at the crests, and of a specified length of engagement.  Design pitch diameter of the enveloping thread is equal to that of the product maximum material limit, Functional diameter may be derived by adding to the pitch diameter in the case of an external thread, or subtracting from the pitch diameter in the case of an internal thread, It is the cumulative effects of variation from specified profile, including variations in lead and flak angles over a specified length of engagement. The effects of taper, out of roundness, and surface defects may be positive or negative on either external or internal threads.  The term functional diameter refers to the GO functional diameter GO thread gages are used to inspect/ evaluate GO functional diameters.  Virtual diameter, effective size, virtual effective diameter, and thread assembly diameter are defined the same as the preferred term functional diameter. 


Original Posting: 3/20/2012
Last Revision:
Error corrections in, or comments about, the above data can be sent to: office@gagecrib.com

About UsUsed SurplusTech InfoCatalogsContact UsBookmark



Gage Crib Worldwide, Inc.
6701 Old 28th St SE, Suite B
Grand Rapids, MI 49546-6937
Phone: 001-616-954-6581 • Fax: 001-616-954-6583

Copyright © 2002-2019 Ring & Plug Thread Gages. All rights reserved.