✨ Get 20% OFF your first order. ✨

Your Shopping Bag

Your bag is empty

Subtotal $0.00
Shipping Calculated at checkout
Continue Shopping

Compact 3" Npt Female X 4-1/2" Nh (nst) Male Aluminum Fire Adapter Limited Time 85% Off [yas5KR7t]

$50.99 $163.99 -69%

SpecificationsFemale Side 1 – 3” NPT Female (National Pipe Tapered)Male Side 2 – 4-1/2” NH (NST) Male (National Hose / National Standard Thread)Working Pressure – 300PSI MaxTest Pressure – 1000PSI MaxMaterial – T-6061 Aluminum (Aircraft Grade)Finishi

Secure Shopping

100% Safe Guarantee

Free Shipping

On orders over $30

Money-Back

30-Day Guarantee

Specifications

  • Female Side 1  3” NPT Female (National Pipe Tapered)
  • Male Side 2 – 4-1/2” NH (NST) Male (National Hose / National Standard Thread)
  • Working Pressure – 300PSI Max
  • Test Pressure – 1000PSI Max
  • Material – T-6061 Aluminum (Aircraft Grade)
  • Finishing – Anodized (99.9% Lead Free)
  • NFPA Standards - 1963, 4.12, 5.1-5.6.4 (Corrosion Resistance)
  • Military Standards – MIL-A-8625 Type III, Class 1
  • Industrial Standards – International ASTM B221
  • UL Labs Standards – 236 – 8.1 Through 8.2
  • USDA Standards – 5100-190C Tables 1-4
  • Origin – Made In The USA
  • Warranty – 5 Year Manufacture

3" NPT Female x 4-1/2” NH (NST) Male Fitting Anodized Aluminum

Need a female to male adapter?  Look no further, this adapter will get the job done in any situation.  Adapters manufactured in the USA with hard-coated anodized aluminum are made to withstand abrasion, are anti-corrosive, and can withstand the highest pressures.  You can trust that these adapters will meet and EXCEED your industrial and municipal needs. 

3 Inch NPT Female x 4.5 Inch NH-NST Male Compatibility Thread Chart

      Built For Your Industry

      Hardcoat anodized aluminum fittings are widely used in industrial, fire, commercial, and residential applications due to their superior strength, light weight, corrosion resistance, and mostly lead free properties.  The fire industry relies on heavy duty adapters that can meet the specifications of NFPA and other fire protection organizations.  The agriculture, industrial, and military industry requires the strongest and safest fittings on the market.  You can be sure these USA manufactured fittings will meet your needs. 

      3 Inch NPT Female x 4.5 Inch NH-NST Male Industrial Applications Infographic

      Universal For All Applications

      The best part about our high quality fittings is that they work for all types of equipment and applications.  Some of these examples include but not limited to: fire hoses & trucks, water pumps, PVC pipe systems, fire hydrants, commercial standpipes, marine vessels, industrial plants, chemical transfer, residential piping systems, shut off valves, & more.  

      3 Inch NPT Female x 4.5 Inch NH-NST Male Fire Hose Pump Hydrant Infographic

      Hardcoat Aluminum Benefits

      • Strong and lightweight – 3 times stronger than brass and more lightweight to carry in tough situations.
      • Superior corrosion resistance to salt and chemicals.
      • Higher working pressures than other metals.
      • Material – T-6061 Aluminum (Aircraft Grade)
      • Anodized aluminum is 99.9% lead free allowing adapter to be used in various applications requiring lead free fittings.
      • We NEVERuse additional paint, dye, or other coloring.
      • Hardcoat aluminum provides reduced electrolysis.
      3 Inch NPT Female x 4.5 Inch NH-NST Male Featured Aluminum Benefits

        The 3" NPT Female Thread Can Connect To:

        • 3" PVC Male
        • 3" NPT Male (National Pipe Tapered)
        • 3" NPTF Male (National Pipe Taper Fuel)
        • 3" TIPT Male (Tapered Iron Pipe Thread)

              The 4-1/2" NH (NST) Male Thread Can Connect To:

              • 4-1/2" NH Female (National Hose – Fire Hose Standard)
              • 4-1/2" NST Female (National Standard Thread – Fire Hose Standard)

                Warranty & Guarantee

                • We ABSOLUTELY 100% GUARANTEE the quality of our fire adapters. 
                • Your adapter will be covered by a 5 YEAR MANUFACTURE WARRANTY.
                • If you are unhappy with your purchase you may return your adapters within 30 days NO QUESTIONS ASKED!
                • Contact us anytime Monday-Friday 9:00am-5:00pm.

                What Our Customers Say

                December 29, 2025

                Absolutely no complaints!

                I'm happy with my great product.

                - Tanya O..

                December 29, 2025

                Absolutely no complaints!

                This is a very good and solid item.

                - Nikki N..

                December 29, 2025

                Absolutely no complaints!

                The engineering is truly masterful.

                - Milo U..

                Write a Review

                You Might Also Like

                Discover more great products from our collection.

                6SE3221-5DC40 Siemens

                6SE3221-5DC40 Siemens

                (432)
                $42.99 $137.99 -69%
                MDT LSS GEN 3 TIKKA SA RH BLK

                MDT LSS GEN 3 TIKKA SA RH BLK

                (824)
                $57.99 $185.99 -69%
                Just Cavalli

                Just Cavalli

                (519)
                $33.99 $108.99 -69%
                York S1-025-46442-000 FUSE

                York S1-025-46442-000 FUSE

                (404)
                $30.99 $99.99 -69%
                Ergon SM Comp Men S/M

                Ergon SM Comp Men S/M

                (682)
                $26.99 $86.99 -69%

                Copyright 2025 © mappa-mercia.org

                VISA
                PayPal
                Stripe
                Mastercard
                CASH ON DELIVERY