JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 4h - M19 x 1 Boring Bar Blank this end mill supports repeatable

this end mill supports repeatable precision and longer tool life across a range of specifications

accurately finished holes with minimal deburring

14 mm reach

dependable checks to confirm parts meet exact threaded specifications

JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 4h - M19 x 1 Boring Bar Blank this end mill supports repeatableThe JBO Thread Ring Gauge (NoGo) is a precision tool for inspecting external threads. Designed for metric fine threads (M19 x 1), it helps engineers, machinists, and quality teams quickly verify that parts stay within the required size and tolerance. Crafted from hardened steel for durability, this right hand, 4h NoGo gauge delivers long lasting performance in demanding workshop environments. Its straightforward design makes it easy to identify non