Alameda 16-18 UNC-3A Go NO Go No PD.2734 Thread Ring Gage

Alameda's 5/16-18 UNC-3A Go/No-Go thread ring gauge is a precision external-thread measuring tool used in quality control to verify mating threads on fasteners and threaded components. This Alameda-branded gauge, a division of Deltronic, provides a Go end and a No-Go end designed for UNC 5/16-18 threads Class 3A, enabling quick pass/fail checks against the correct thread form. For this size, the Go end targets a pitch diameter of 0.2764 inches and the No-Go end targets a pitch diameter of 0.2734 inches, aligning with common 3A specifications for 5/16-18 UNC and ensuring parts thread together within tight tolerances. The gage is used in manufacturing and repair environments to ensure fasteners and housings thread properly, supporting reliable assembly in automotive, aerospace, and general metal fabrication where correct external thread engagement is critical.