JBO Thread Ring Gauge (GO) - UNC - Left Hand - 2A - No. 6 x 32 ER Collet Chucks it features a 150 mm

it features a 150 mm gauge length to improve rigidity and stability in demanding applications

while the tool’s geometry minimizes load on the spindle and improves chip management

Grade & Coating: CR3 Ultra-Fine carbide grade with a new generation PVD coating for high-hardness

and precise ISO H5 tolerance supports consistent bore quality across multiple finishing tasks

this reamer features a left-hand spiral flute and right-hand cutting for predictable

JBO Thread Ring Gauge (GO) - UNC - Left Hand - 2A - No. 6 x 32 ER Collet Chucks it features a 150 mmThe JBO Thread Ring Gauge (GO) for UNC Left Hand threads, No. 6 x 32, is a precision Go gauge designed to verify external thread diameters quickly and reliably. Its ideal for machine shops, manufacturers, and quality teams that need fast, repeatable thread checks as part of routine QC. Its simple, focused function helps inspectors confirm parts meet the exact UNC specification on every lot. Crafted from hardened steel for durability, this gauge