Shop Jack Chain, 12 ga., Steel, 0.105 in. Dia., 100 ft. by L. H. Dottie (CH1212) at Graybar, your trusted resource for Hangers and Accessories and other L. H. Dottie ... Fittings and Hardware Hangers, Clamps and Clips Fixture, Duct and Tray Hangers Chain #JC-12-S O-Z/GEDNEY #JC-12-S Jack Chain, No.12, 12-ga, Steel, Bright Galvanized, 29-lb, 100-ft Spool Spec Sheets; Where to Buy; ... #12 JACK CHAIN STAINLESS 100F. Jack Chain. Part Number: 72013 #12 JACK CHAIN ZP-BOXED. Jack Chain. Part Number: 72014 #14 JACK CHAIN ZP ... Single jack chain. Ideal for fixture and novelty suspension, and general utility use not requiring high strength. Low-carbon steel.