Aluminum 3" NH to 3" NPT Double Male Threads_NPT x NPT 11 1/2 threads per inch

11 1/2 threads per inch and male 1 inch NPSH

Equivalent part number - SM25F30T

11 1/2 threads per inch and male 1 inch NPSH

REF/PN: MIL-H-24606

Aluminum 3" NH to 3" NPT Double Male Threads_NPT x NPT 11 1/2 threads per inchAluminum 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. Note 3 inch NH NST is very rare and is often confused with 2. 5 inch NH NST which is very common. If you have a fire department