Starrett 155 Screw Pitch Gage With Locking Device, 2-1/4 to 28 TPI Measuring, 27 Leaves, Steel

• Most useful tool in any mechanics tool box
• Quickly determines the pitch of a various threads
• Features a locking device at both ends of the case so leaves can be securely locked in position for use
• Leaves have a special narrow design in, permitting checking internal threads in nuts as well as external threads

2-1/4 TPI, 2-3/8 TPI, 2-1/2 TPI, 2-5/8 TPI, 2-3/4 TPI, 2-7/8 TPI, 3 TPI, 3-1/4 TPI, 3-1/2 TPI, 4 TPI, 4-1/2 TPI, 5 TPI, 5-1/2 TPI, 6 TPI, 7 TPI, 8 TPI, 9 TPI, 10 TPI, 11 TPI, 12 TPI, 13 TPI, 14 TPI, 16 TPI, 18 TPI, 20 TPI, 24 TPI, 28 TPI