Aluminum 4" Female NPT to 4 1/2" Male NH Female Threads_NH Threaded ends color may vary

Threaded ends color may vary silver or gold

All aluminum components are hardcoat anodized per MIL-A-8625 Type III

This thread is NOT the same thread as the thread known as NYFD or FDNY thread

Water Mist is suitable for use on both Class A and Class C fires

Wall mounting brackets are standard

Aluminum 4" Female NPT to 4 1/2" Male NH Female Threads_NH Threaded ends color may varyAluminum adapters are fabricated from seamless extruded 6061 T6 aluminum and hard coat anodized per MIL A 8625 Type III, Class 1. Threads have a blunt start Higbee cut with indicators on adjacent lugs. Part identifications are permanent and stamped prior to hardcoat. Adapters and components meet the requirements of NFPA 1963. The Safe Water Drinking Act section 1417 requires "Lead Free" products to be a minimum of 99. 75% lead free. Aluminum Female to