Screw; stainless steel, bare; socket head; thread: 5/16”-18; length: 3 ” (76 mm); wrench size: 1/4 ”; gross weight: 30 g

Gasket by James Gaskets; for Generator; fits Big Twin 1958-1969, Sportster 1958-1984; to engine; paper; replaces OEM HD 30143-58; gross weight: 1 g

Back in the days it was common to carry a set of spare spark plugs easily accessible on the motorcycle. Thus in case of a necessary change you didn’t have to dig them up deep from the bottom of your saddlebags. These block-off plates with two threaded sockets derive from the race track and are intended for magneto equipped bikes without generator. They simply install in lieu of your genny and bolt down with the stock hardware.