JBO Thread Ring Gauge (NoGo) - UNF - Left Hand - 2A - No. 12 x 28 ER Collet Chucks Ideal for applications requiring DIN

Ideal for applications requiring DIN 212 B-like tolerance and meticulous hole expansion at a 0

HSS‑E (M35 cobalt) construction: Delivers improved wear resistance and longer tool life for demanding drilling and reaming tasks

Why this ER20 collet stands out

coating strength

With an uncoated finish

JBO Thread Ring Gauge (NoGo) - UNF - Left Hand - 2A - No. 12 x 28 ER Collet Chucks Ideal for applications requiring DINThe JBO Thread Ring Gauge (NoGo) is a precision external thread gauge designed to verify UNF threads. Sized for left hand threads in the 2A class, No. 12 x 28, its a reliable tool for quality inspectors, machinists, and engineers in manufacturing, automotive, and aerospace. Its NoGo design provides quick visual confirmation of non conforming threads, helping ensure proper fitment and reducing rework. NoGo design for fast conformance checks: Quickly