Insize Thread Plug Gage 3/4-10 UNC Class 2B Series 4643-3B1 Insize 55° Setting Standard for Screw Thread Micrometers 100–125 mm Series 3281-SP4 90° - ±1°

90° - ±1°

High Accuracy – Ground to UNF 2B tolerance for repeatable

Insize 75 - 100 mm / 4-5" IP65 Outside Micrometer

allowing precise reaming in the 46-56mm range

The Insize 3-Piece Measuring Tool Set combines flexibility

Insize Thread Plug Gage 3/4-10 UNC Class 2B Series 4643-3B1 Insize 55° Setting Standard for Screw Thread Micrometers 100–125 mm Series 3281-SP4 90° - ±1°Insize Thread Plug Gage 3 4 10 UNC Class 2B Series 4643 3B1 The Insize 4643 3B1 Thread Plug Gage is designed for accurate inspection of 3 4 10 UNC internal threads, Class 2B. Built to ANSI B1. 2 standards, it includes GO and NOGO ends for reliable gauging. Manufactured from OHNS steel, hardened to HRC6062, it ensures wear resistance and long service life. Supplied with a manufacturer's inspection certificate for quality assurance. Specifications: Part