Seal Fast aluminum male x female NPSH shank coupling with brass nut. The fitting features dual ribbed cylindrical hose ends joined by a central brass locking ring, with side lugs for secure alignment. Designed for 4" and 6" hose connections in water and air transfer systems. Durable and corrosion-resistant for industrial use.
Seal Fast aluminum male x female NPSH shank coupling with brass nut. The fitting features dual ribbed cylindrical hose ends joined by a central brass locking ring, with side lugs for secure alignment. Designed for 4" and 6" hose connections in water and air transfer systems. Durable and corrosion-resistant for industrial use.
Seal Fast aluminum male x female NPSH shank coupling with brass nut. The fitting features dual ribbed cylindrical hose ends joined by a central brass locking ring, with side lugs for secure alignment. Designed for 4" and 6" hose connections in water and air transfer systems. Durable and corrosion-resistant for industrial use.
Seal Fast aluminum male x female NPSH shank coupling with brass nut. The fitting features dual ribbed cylindrical hose ends joined by a central brass locking ring, with side lugs for secure alignment. Designed for 4" and 6" hose connections in water and air transfer systems. Durable and corrosion-resistant for industrial use.
Seal Fast

Seal Fast NPSH Shank Coupling AL400S AL00S 4 and 6 Inch Aluminum Fitting Brass Nut Male Female Connections Industrial Fluid Agricultural Water Air Transfer

In stock
SKU: AL400S
$75.04 USD

SIZE
Description

Professional Aluminum NPSH Hose Shank Coupling with Heavy Duty Brass Nut

The Seal Fast AL400S is a contractor-grade 4-inch aluminum male-by-female NPSH shank coupling engineered to deliver secure, leak-resistant connections for industrial fluid assemblies. Equipped with a robust brass nut for reliable tightening and threaded engagement, this high-flow shank coupling provides corrosion resistance and lightweight site handling for large-diameter lines. Optimized for high-volume municipal water discharge, agricultural irrigation infrastructure, and construction site air or water transfer applications, this premium fitting is rated exclusively for air and liquid service and is not for steam systems.

Best Used For:

  • Agricultural Irrigation Setup: Joining large-diameter supply lines to transfer high-volume water across farm irrigation zones.
  • Municipal Water Discharge: Connecting industrial suction or discharge hoses for municipal water bypass and flood control pumping.
  • Construction Fluid Infrastructure: Securing heavy-duty jobsite water and compressed air distribution manifolds over rugged terrain.

Key Performance & Safety Features

  • Aluminum Shank Geometry: Provides an industrial-strength, lightweight profile that prevents operational corrosion and minimizes operator haul fatigue.
  • Heavy Duty Brass Nut: Features structural brass threads that maximize tightening torque and seal compression for long-term jobsite sealing.
  • Standard NPSH Compatibility: Straight thread profile ensures rapid, predictable matching with standard industrial hose ends and piping components.
  • Dual-Service Capability: Rated to securely manage high-volume water movement and technical compressed air paths without structural degradation.
  • Deep Multi-Ribbed Barbs: Machined shank ridges optimize raw hose friction grip and maximize banding clamp retention under heavy working loads.

What's Included

  • (1) Seal Fast Aluminum Male x Female NPSH Shank Coupling with Brass Nut

Technical Specifications

Fitting Type: Shank Coupling
Thread Type: Male x Female NPSH (Straight Thread)
Nominal Size: 4 in.
Alternative Size Profile: 6 in.
Body Material: Industrial Grade Aluminum
Nut Material: Heavy Duty Forged Brass
Service Applications: Water and Compressed Air Transfer
Steam Compatibility: Not Rated for Steam Service
Model Numbers: AL400S (4 in.) / AL600S (6 in.)
Connection Style: Hose Barb Shank to Threaded Nut

Pro-Tip: When installing this coupling into high-pressure layflat or rubber hose, apply a light coat of silicone-based spray lubricant to the aluminum hose shank barbs. This allows the coupling to slide smoothly to the base of the hose cuff, preventing structural tears and ensuring an airtight seat for your interlocking punch or bolt clamps.