I’m sorry I don’t have the exact year and model of the engine other than it was a SP SD-40, and these were lost while trying to change the gears on the drive wheels. They should fit most KATO HO engines.
This is a HO scale device. In Montana and Eastern Idaho the Milwaukee Railroad used creosote treated poles for trolley support on the electrified regions. When they crossed a long bridge, Blacktail Trestle outside of Butte, Montana for example, these devices were riveted on the side of the bridge to support the trolley poles. See…
Milwaukee Railroad log cars. By using these more or less permanent log bunks the cars were always ready for use. The car always had support in place to carry a full load of logs with out having to locate/cut new slats for every use.