ASTM A970/A970M-13a

1.1.1 Welding;

1.1.2 Integrally hot forging of a head from the reinforcing bar end;

1.1.3 Internal threads in the head mating to threads on the bar end;

1.1.4 Cold-swaging an externally threaded coupling sleeve onto the reinforcing bar;

1.1.5 Cold-extruding an external coupling sleeve onto the reinforcing bar;

1.1.6 Cold-swaging an external coupling sleeve or headed sleeve onto the reinforcing bar;

1.1.7 Attaching a coupling sleeve to the end of the reinforcing bar by means of the means of a ferrous-filler medium; or

1.1.8 Separate threaded nut to secure the head to the bar.

1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the specification.

1.5 This specification does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.