1.1 This specification covers weldless chain suitable for applications where a light and flexible chain is required. The material may be steel, brass, or bronze.

1.2 Seven classes of chain are covered:

1.2.1 Class SL Single-loop chain.

1.2.2 Class DL Double-loop chain.

1.2.3 Class SH Sash chain.

1.2.4 Class SF Plumbers' chain.

1.2.5 Class SJ Single-jack chain.

1.2.6 Class DJ Double-jack chain.

1.2.7 Class RG Register chain.

1.3 The values stated in either SI units or in other units shall be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system must be used independently of the other, without combining values in any way.