Industrial MIL-S-8879-A Go No-Go Thread Plug Gauge for inspecting internal threads to MIL-S-8879-A tolerances. Go size: 4.500-16 (4-1/2 in diameter, 16 threads per inch); No-Go pitch diameter: 4.4651 in. This plug gauge lets you quickly confirm whether a threaded bore meets minimum and maximum limits by checking that the Go size engages and the No-Go size does not pass. Ideal for quality control in manufacturing where precise internal threading is essential for mating components and fasteners.
