JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 4H - M28 x 1 Face Mill Arbors - Through Coolant it delivers consistent accuracy and

it delivers consistent accuracy and stable tool control during demanding tapping operations

it’s a practical choice for precision machining

making it suitable for applications requiring tight tolerances and repeatable results

and proven BS 328/4 compatibility makes it a reliable choice for engineers

Durability & finish: Designed to sustain extended tool life and stable finishes

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 4H - M28 x 1 Face Mill Arbors - Through Coolant it delivers consistent accuracy andThe JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads, specifically tuned for M28 x 1. This right hand, 4H gauge is ideal for machinists, quality teams, and assembly technicians who need reliable thread verification to ensure parts fit together smoothly. Durable construction with hardened steel and a knurled grip delivers long lasting performance in busy workshops. The Go No Go design enables quick pass fail checks