J42
J42 may refer to:
- County Route J42 (California)
- Elongated pentagonal orthobirotunda, a Johnson solid (J42)
- HMS Halcyon (J42), a minesweeper of the Royal Navy
- Pratt & Whitney J42, a turbojet engine
- Tracheitis
This disambiguation page lists articles associated with the same title formed as a letter–number combination.
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