This O.S. Engine OS73300812 part is a set of three dust caps made for R/C intake and air filter connections. They provide straightforward protection to reduce dust and debris contact with 8mm diameter intake spigots found on many model engines.
Ensure compatibility by measuring the spigot or shaft diameter; these caps are designed for 8mm fittings only. Fitting is done by hand: press the cap over the spigot until it sits flush, check for a snug fit, and remove before operating the engine. No additional fasteners are typically required.
For workshop and transport use, these caps help keep intake interfaces cleaner between runs and during servicing. They are intended as handy maintenance items for short-term protection and filter servicing tasks.
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