401 Steel (New Style) Standard Escutcheon Cup Brass 1/2" NST

Measurements:

• Inside Diameter - 3/4"
• Outside Diameter - 2 3/16"
  
• Depth - 1 7/8"

Inside Diameter for 1/2" NPT Heads -  3/4"

Inside Diameter for 3/4" NPT Heads - 1"

Previously Part# E9. For use with 401 steel skirts.

NPT stands for National Pipe Thread.  To determine what size sprinkler head you have, measure the bottom of your sprinkler head at the base of the threads.  The 1/2" fire sprinkler base measures at 3/4".  The 3/4" fire sprinkler base measures at 1".

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm.  For more information go to www.P65Warnings.ca.gov.