These are Locomotive (Steam Fountain Style) Pipe Whistle Valves.
Available in:
3/8 x 32tpi T/S 1/4 Pipe (Would suit our Chime Whistles)
5/16 x 32tpi T/S 1/8 Pipe (Would Suit our Smaller Single not whistles)
1/4 x 40tpi T/S 1/8 Pipe (Would Suit our Smaller Single not whistles)
These are manufactured items, so please allow up to 7 days for delivery.