Insize American Standard Thread Plug Gauges – No. 2-56 UNC 5pc Compression 90° Male Elbow (T1/8xM1/8) - Compatible with a wide

- Compatible with a wide range of milling machines

and flanks—ideal for demanding internal threading applications where fine threads are required

Key Advantage: Full-profile threading with exceptional strength and performance for large-pitch Stub ACME forms

and finishing in steel

✔ Spring-Loaded Mechanism – Gradually compresses as drilling progresses

Insize American Standard Thread Plug Gauges – No. 2-56 UNC 5pc Compression 90° Male Elbow (T1/8xM1/8) - Compatible with a wideInsize 4131 21 GO NO GO Thread Plug Gauge No. 2 56 UNC, Class 2B The Insize 4131 21 GO NO GO thread plug gauge is a precision inspection tool designed for checking internal threads to ANSI ASME B1. 2 standards. Covering No. 2 56 UNC threads in Class 2B tolerance, this gauge allows fast and reliable verification of thread size and form in production and quality control environments. Supplied as a matched GO and NO GO pair in a single handle, the 4131