Spanner. Is a wrench for turning round nuts having holes or slots.
Spanner.
Spline or feather. A key made fast in a shaft.
Split-pin or cutter. An iron pin divided at the end which is to be spread apart after inserting in the hole.
“Spread.” A term used to indicate the distance from center to center of the cylinders of a duplex pump.
Spring-seat. An elastic seat for a valve.
Steam thrown valves. Valves moved by steam only.
Steam end of a pump. The end operated by steam.