4" Fig 100 Threaded Female Sub – Hammer Union Component

The 4" Figure 100 Threaded Female Sub is a massive, heavy-duty flow control component engineered for ultra-high-volume, low-pressure fluid routing across upstream, midstream, and industrial applications. Rated for a 1,000 PSI Cold Working Pressure (CWP), this highly robust forged steel component serves as the static half of a complete large-bore Figure 100 hammer union assembly. It is explicitly designed to provide the critical conical seating surface required for a dependable metal-to-metal seal in standard rig utility lines, bulk water transfer, and high-capacity low-pressure manifolds.

Designed with precision-cut female threaded ends (NPT / Line Pipe), this 4-inch female sub allows for secure, vibration-resistant integration onto standard large-bore threaded pipework. It is manufactured from high-strength industrial-grade forged steel to withstand the mechanical field handling, harsh weather conditions, and continuous line vibration typical of large-scale utility operations.

By eliminating the need for secondary elastomeric seals, the Figure 100 female sub offers a streamlined, low-maintenance solution for non-critical flowlines. Whether used as a replacement part for damaged iron or as a foundational component for fabricating custom low-pressure temporary manifolds, this massive sub delivers ultra-high flow capacity and structural resilience.

Features & Benefits

• 1,000 PSI Pressure Rating: Engineered to safely manage continuous fluid transfer in standard low-pressure systems with a reliable 1,000 PSI Cold Working Pressure (CWP) rating.

• Component Specific Application: Includes the rugged female sub only, serving as an ideal replacement part or foundational fabrication component for custom large-bore threaded manifolds.

• Ultra-High Flow Capacity: The massive 4-inch nominal bore safely accommodates the immense fluid volumes required for large-scale utility, transfer, and suction networks.

• Precision Metal-to-Metal Seat: Features an exactingly machined conical interior designed to mate perfectly with a standard Figure 100 male sub, providing a tight, reliable seal without elastomer rings.

• Threaded Connections: Precision-machined NPT threaded ends ensure a secure, straightforward, and vibration-resistant connection to standard 4-inch threaded line pipe.

• Forged Steel Construction: Built from industrial-grade forged steel to deliver exceptional durability and resistance against mechanical impacts and rough field handling.

Specifications & Technical Details

Applications

This large-bore 4" Figure 100 threaded female sub is an essential component for reliable, ultra-high-capacity, low-pressure fluid systems. Typical applications include the fabrication and repair of heavy-duty rig utility lines, standard water and air transfer networks, massive low-pressure manifold assemblies, bulk storage tank tie-ins, and replacing damaged static ends on existing threaded assemblies to maintain maximum structural integrity under 1,000 PSI pressure.

Quality Assurance

Each component undergoes rigorous quality control protocols, including precision dimensional verification of the internal conical seat, exact thread gauging, and full material traceability (MTRs), ensuring complete structural integrity and safe pressure containment.

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