Brownells Brownells Brownells 75th Anniversary - A Shooting Heritage

Quick Check For Thread Angle & TPI

Double depth of American National Thread. Tempered stainless steel with three 60° notched angles. Graduations in 14th, 20th, 25th, and 32nd per inch to determine tpi.

Big Book Catalog, Issue:67, Page:472
SPECS: 2¼" (5.7cm) x ¾" (19mm), .044" (1.1mm) thick.