OEM Ingersoll Rand fill plug for the bare SS3 compressor pump. This cap is typically removed when you to fill the pump with oil when you service the compressor. 49812050 includes both the cap and o-ring that seals the threads.
This part number may also be listed as 54540851. 54540851 supersedes to 49812050, so purchasing this item would be correct.
This oil fill cap and o-ring will work with the following SS3 models:
Part #: 70243712
Part #: 70243936
Part #: 97336127
Part #: PSL20
Part #: 38436721
Part #: 54571609
Part #: 97330658