The Oil Cap Rubber Plug is a replacement component designed for compatible 21-35, 21-36, 21-40, and 21-88 oil caps. Ideal for oil-bath trailer hub maintenance, this replacement plug helps close the oil cap access opening and is a convenient solution for replacing a worn, damaged, or missing plug.
Features:
- Replacement oil cap rubber plug
- Compatible with multiple oil cap models
- Fits 21-35 oil caps
- Fits 21-36 oil caps
- Fits 21-40 oil caps
- Fits 21-88 oil caps
- Rubber construction
- Designed for compatible oil-bath hub systems
- Ideal for routine trailer hub maintenance and repair
- Convenient replacement for damaged, worn, or missing plugs
- Oil cap sold separately