Brownells Brownells Brownells 75th Anniversary - A Shooting Heritage

Three Tools Measure Most Standard World-Wide Threads

Straight gauges in three size ranges and thread styles. All steel. Precision cut threads for accurate measuring. Sizes permanently stamped into each leaf.

Big Book Catalog, Issue:67, Page:464
Big Book Catalog, Issue:67, Page:470
SPECS: English - 28 blades, 4 to 80 tpi; Metric - 24 blades, 60°; British (BSW) - 28 blades, 55°.