Vermont Gage Thread Gages: Precision Thread Measurement Solutions

VG thread gages (thread gauges) are precision inspection tools used to verify threaded features on parts for size, fit, and functional assembly (application dependent). In production and quality control, thread gages are commonly used for fast, repeatable checks—helping teams confirm that internal or external threads meet print requirements without relying only on variable measuring tools. Depending on the item, thread gaging may be done with thread plug gages (for internal threads) and thread ring gages (for external threads), often in GO/NO‑GO configurations for pass/fail inspection (verify per listing).

Working Thread Plug, Thread Ring and Thread Setting Plug Gages are manufactured to inspect the Pitch Diameter and the Functional Thread. Thread gages are used to ensure the assembly of mating parts. Unified Inch standard gages are manufactured per ASME B1.2. M Series Metric thread gages are manufactured per ASME B1.16M. Standard thread gages are made to a Class X tolerance. Gages may be purchased individually or as assemblies. Plug gage assemblies are marked with the thread size, class of fit and pitch diameters. Pipe Gages per ASME B1.20.1,  ASME B1.20.5 and Hole Location gages stocked. ACME, Buttress, STI and gages for other custom thread forms are also available.