JBO Thread Ring Gauge (GO) - UNC - Left Hand - 2A - No. 5 x 40 End Mill Holders secure mounting: The standard taper

secure mounting: The standard taper shank enables fast tool changes and reliable alignment in compatible holders and machines

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

The Omega DIN2080 ISO40 Morse Taper Adaptor (MTA1) provides a precise

The dedicated aluminium design supports faster material removal while maintaining control

Finish: Uncoated surface to minimize friction and support smooth chip flow

JBO Thread Ring Gauge (GO) - UNC - Left Hand - 2A - No. 5 x 40 End Mill Holders secure mounting: The standard taperThe 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