Punch Stems and Coupling Nuts

American Punch inventories coupling nuts for a wide range of ironworkers. To order the correct punch stems and coupling nuts for your application, refer to the following diagrams when speaking with one of our sales representatives.

Coupling Nuts

Coupling nuts are available in bore sizes from 7/16” to 1 5/64”. Coupling nuts can be modified to fit oversize punches.  The size is limited to the I.D. thread diameter.

No. Thread Hex Height Bore A2C 11/16 – 14 1-1/16 1-1/16 7/16 A4C 7/8 – 12 1-5/16 1-3/16 37/64 A7C 1-1/16 – 12 1-11/16 1-3/16 53/64 A8C 1-1/8 – 10 1-5/8 1-3/8 37/64 A9C 1-1/8 – 10 1-5/8 1-3/8 49/64 A12C 1-5/16 – 12 2 1-1/4 1-5/64 A13C 1-3/8 – 10 2 1-5/8 1-5/64 A15C 1-13/32 – 10 2 1-3/8 1-5/64 A17C 1-9/16 – 12 2-1/4 1-1/2 1-17/64 A18C 1-11/16 – 10 2-1/4 1-1/2 1-5/64 A21C 1-7/8 – 12 2-1/2 1-9/16 1-37/64 A22C 2 – 10 2-5/8 1-3/4 1-5/64 Coupling nuts can be modified to fit oversize punches. The size is limited to I.D. thread diameter.

Close Center Coupling Nuts

Punch Stems

Note:  Punch Stems and coupling nuts must be properly tightened to hold tooling securely.

Adding keyways to the face of the punch stem will aid in alignment and increase tool life. Keyways are not provided as a standard item as keying systems vary from one ironworker manufacturer to another. Please tell our sales representative the specific tooling you need and the manufacturer of your ironworker so that we can supply the correct keyways.