Schedule 40 Steel Pipe Nipple, 1-1/4-11-1/2 Male NPT, 4.50 Inch Long

Yes, this Schedule 40 steel pipe nipple has a 1-1/4-11-1/2 male NPT thread, so it'll fit standard 1 1/4 inch NPT fittings just fine.

Standard 1-1/4 NPT fittings will thread right onto this without any issue. The thread spec is 1-1/4-11-1/2 NPT, which is the standard male thread pitch for that pipe size, so any matching female NPT coupling, valve, or fitting will connect up clean. Just keep in mind there's no sealant pre-applied, so you'll want to wrap the threads with PTFE tape or use your preferred thread compound before making the connection.

The thread callout on this nipple is 1-1/4-11-1/2 male NPT, so it’s made to mate with a 1-1/4 female NPT connection.