JBO Thread Plug Gauge - UNC Go-No/Go - Left Hand - 2B - 3/8 x 16 Milling Cutter Arbors built to withstand the rigors

built to withstand the rigors of high-speed machining for steady

while the straight shank ensures stable alignment in common tooling setups

built from M2 high-speed steel for durability and long tool life

which translates to better part finishes and reduced secondary processing

extending tool life and maintaining a smoother cutting experience

JBO Thread Plug Gauge - UNC Go-No/Go - Left Hand - 2B - 3/8 x 16 Milling Cutter Arbors built to withstand the rigorsThe JBO Thread Plug Gauge is a precision inspection tool designed for verifying UNC left hand thread holes. Use it to quickly check 3 8 x 16 threaded holes in manufacturing, automotive, and aerospace applications, ensuring parts meet documented thread standards. Its go no go design provides immediate feedback, helping technicians confirm proper fitment and reduce rework on the shop floor. Go No Go quick check for UNC left hand threads: Two ends enable