JBO Thread Plug Gauge - UNJF Go-No/Go - Right Hand - 3B - 1/2 x 20 FMH FLH FHH S&E A&NF M&D Ball Nose geometry for smooth

Ball Nose geometry for smooth curved contours: Creates accurate radii on narrow ribs and curved surfaces

Whether you're finishing intricate components

Carbide cutting edges retain their sharpness longer than traditional HSS

Taper Shank for Secure Mounting: Precise alignment in compatible holders

Broad compatibility: Enables using larger-diameter tools in smaller tool holders or spindles with confidence

JBO Thread Plug Gauge - UNJF Go-No/Go - Right Hand - 3B - 1/2 x 20 FMH FLH FHH S&E A&NF M&D Ball Nose geometry for smoothThe JBO Thread Plug Gauge UNJF Go No Go Right Hand 3B 1 2 x 20 is a precision inspection tool for verifying UNJF threaded holes. Its compact, hand size design makes it ideal for manufacturing, automotive, aerospace, and shop floor QC tasks, where fast, repeatable checks are essential. With a dedicated go and no go end, it offers a clear, tactile pass fail indication for each hole you measure helping you confirm correct thread engagement, proper depth,