JBO Thread Ring Gauge (GO) - UNC - Left Hand - 2A - No. 5 x 40 End Mill Holders right-hand 6G design: Knurled handle

right-hand 6G design: Knurled handle and right-hand orientation provide secure handling and consistent results when checking internal threads in the field or on the shop floor

and efficient 2-flute geometry delivers stable performance

along with a prominent datum marker

M2 HSS with ISO H5 Tolerance: Delivers bore finishes to -0 / +0

005 mm) maintains precise dimensions and long

JBO Thread Ring Gauge (GO) - UNC - Left Hand - 2A - No. 5 x 40 End Mill Holders right-hand 6G design: Knurled handleThe JBO Thread Ring Gauge GO for UNC threads is a precision tool built to quickly verify external thread diameters on fasteners, fittings, and machined parts. Designed for a broad user baseengineers, buyers, tradespeople, hobbyists, and quality teamsit provides a straightforward Go check that confirms parts meet UNC specifications with reliability and efficiency. This model is specifically configured for Left Hand UNC threads, 2A class, size No. 5 x