a small air leak at a crank seal or an intake gasket will cause the usually perfect fuel air mixture in the crankcase to become slightly lean sometimes very lean this lean mixture can quickly result in a seized piston air leaks are by far the number one cause of vintage engine piston seizures
Lugs are the electrical connectors that terminate the electrical circuit. Lugs are made of copper, aluminum, or bronze. They are made for the smallest wire size, 26 gauge to the largest 2000 MCM. Lugs can be mechanical or set screw; compression or crimp, solder or weld; or clamp type.
1 Lug, part of a drum used in conjunction with tension rods and counter hoops to tension the drum head in relation to the shell.  Lug (electrical connector), a bolt on an enclosure tied to an electric potential within the enclosure, supporting the connection of a cable.