JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 4h - M21 x 1 ER Mini Collet Chucks Left-Hand Spiral Flute with Right-Hand

Left-Hand Spiral Flute with Right-Hand Cutting: Enables stable cutting and efficient chip evacuation for smooth bore finishes and predictable results

The FMB27 model with a 45 mm gauge length provides consistent cutter seating and predictable positioning

The Omega ER32 Collet Ultra Precision is a high-precision clamping accessory designed for ER32 collet chucks

Built for reliable milling performance

W Coated Carbide for Durability: The coating enhances heat resistance and wear life

JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 4h - M21 x 1 ER Mini Collet Chucks Left-Hand Spiral Flute with Right-HandThe JBO Thread Ring Gauge (GO) Metric Fine, Right Hand M21 x 1 (4h) is a precision inspection tool for confirming external thread diameters. Ideal for quality control labs, production lines, and maintenance workshops, it provides a reliable go no go test that quickly verifies components meet the M21 x 1 standard and its 4h tolerance. Manufactured from hardened steel, it delivers long lasting wear resistance in busy environments. Its simple, intuitive