JBO Thread Ring Gauge (GO) - UNF - Right Hand - 3A - 1 x 12 NCDC Drill Chuck smooth cutting action during reaming

smooth cutting action during reaming

Corner Radius for Consistent Mold & Die Edges: The precise R0

smooth surfaces and repeatable results on HRc70 alloys

secure seating in common toolholders for quick setup and reliable performance

The combination of tapered-neck stability

JBO Thread Ring Gauge (GO) - UNF - Right Hand - 3A - 1 x 12 NCDC Drill Chuck smooth cutting action during reamingThe JBO Thread Ring Gauge (GO) for UNF Right Hand 3A 1 x 12 is a go no go gauge that helps you verify external thread diameters quickly and reliably. Its ideal for machinists, quality inspectors, and shop floor teams aiming to confirm that threaded components conform to the UNF standard and maintain consistent performance in assemblies. Constructed for durability, the gauge is made from hardened steel to withstand daily use in demanding environments.