Regal Beloit Corporation 1 4-28 UNF-2B Thread Plug

Regal Beloit certified 1/4-28 UNF 2B thread plug gage (left-hand thread version) used to verify internal threads in holes machined to 1/4-28 UNF with class 2B tolerance, ensuring consistent fit during assembly and maintenance. Regal's thread plug gages are designed for quality control in manufacturing, inspection, and repair environments, providing GO and NO-GO checks to confirm adherence to specified thread dimensions and pitch diameter. Go diameter is 0.2268 inches and No-Go diameter is 0.2311 inches, these values reflect the standard Regal Beloit/Regal Premium 1/4-28 UNF 2B plug gage specifications used for dimensional verification. This gage variant is part of Regal's catalog of working thread plug gages, which support consistent thread quality verification across machining, fabrication, and service operations.