JBO Thread Ring Gauge (GO) - UNF - Right Hand - 3A - 1/4 x 28 ER Collet Chucks If the listing mentions “in

If the listing mentions “in stock

it uses a taper shank for secure seating in standard machine chucks and features a left-hand spiral flute with right-hand cutting for efficient material removal and a clean finish

Designed for right-hand threads with a 4H tolerance

No-Go design for fast conformance checks: The no-go feature provides an immediate visual cue for non-conforming threads

Application: Suitable for use in milling machines and CNC machining centers on steel

JBO Thread Ring Gauge (GO) - UNF - Right Hand - 3A - 1/4 x 28 ER Collet Chucks If the listing mentions “inThe JBO Thread Ring Gauge (GO) for UNF right hand threads in size 1 4 x 28 is a precision Go gauge designed to verify external thread diameters quickly and reliably. It supports quality control across machining, assembly, and maintenance tasks, helping you confirm that threaded components meet the 1 4 28 UNF standard with minimal effort. Crafted from hardened steel, it delivers durable performance in demanding work environments while resisting wear