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Alpha Thread Gage, Inc.

"Leading the pack in the thread gage industry!"                                                                                  

·680 Ajax Drive, Madison Heights, MI 48071-4214·

1-800-267-0181 (TOLL FREE) · (248) 589-9310 · FAX (248)589-9315 · E-MAIL
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REFERENCE SHEET

Reference Sheets Available Pipe Thread Gages- Illustrated • Internal & External Threads Illustrated
   
internal  
For gaging internal internal taper threads, the plug gage is screwed up tight by hand into the internal thread of the product. The thread is within the permissible tolerance when the gaging notch of the working plug gage is not more than 1 turn, large or small, from being flush with the end of the thread.
external  
In gaging external taper threads, the ring gage is screwed up tight by hand on external thread of product. The thread is within the permissible tolerance when the gaging face of the working ring gage is not more than 1 turn, large or small, from being flush with the end of the thread.
   
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