View Single Post
Old 11-18-2010, 12:08 AM
Wet_Boots's Avatar
Wet_Boots Wet_Boots is offline
LawnSite Fanatic
Join Date: Mar 2005
Location: metro NYC
Posts: 44,750
There are machine-screw standards that match other sprinkler stuff. Residential brass (1/2-inch) impact-head nozzles came in two nozzle thread patterns, and the coarser of the two thread patterns matched a 3/8 x 24 UNF screw. The finer-thread nozzles were a match for 1/8 x 27 pipe threads, and maybe that's where 27 tpi stuff came from.

Your 'standard' Richdel/Irritrol solenoid has 3/4 x 20 threads, and that matches an extra-fine thread (UNEF) standard.
Reply With Quote
Page generated in 0.03828 seconds with 8 queries