JBO Plug Gauge - UNC (STI) Heli Coil Gauge - Right Hand - 3B - No. 4 x 40 - Calibrated (DAkkS Calibration) Tiny Tool Inserts This standard-length reamer is specified

This standard-length reamer is specified at 45

intuitive use

consistent internal threads with fewer setups and reduced downtime

Precision: Ground to tight tolerances for reliable milling accuracy

This reamer is designed to support efficient workflows: it delivers consistent hole sizes with minimal finishing work

JBO Plug Gauge - UNC (STI) Heli Coil Gauge - Right Hand - 3B - No. 4 x 40 - Calibrated (DAkkS Calibration) Tiny Tool Inserts This standard-length reamer is specifiedThe JBO Plug Gauge UNC (STI) Right Hand 3B No. 4 x 40 Calibrated (DAkkS Calibration) is a precision measurement tool designed for UNC screw thread inserts (STIs). These Helicoil gauges are manufactured and assessed in accordance with ANSI ASME thread standards, delivering reliable checks in manufacturing, automotive, and aerospace environments. Built for right hand UNC STI inserts, this gauge helps verify pitch diameter and conformity quickly and