3" 2,000 PSI Fig 206 Threaded Female Blind Sub – Oil & Gas Hammer Union

The 3" Figure 206 Threaded Female Blind Sub is a medium-pressure closure fitting designed to safely cap off and isolate the male end of a hammer union connection. Rated for a Cold Working Pressure (CWP) of 2,000 PSI, the Figure 206 series is distinguished by the inclusion of a secondary O-ring seal in the male sub, which provides a leak-proof connection even in applications involving air, water, oil, or gas where vibration or slight misalignment may occur.

Manufactured from high-strength forged steel, this female blind sub features the standard Figure 206 external Acme threads. It is engineered to mate perfectly with a 3" Fig 206 male sub, using the union’s wing nut to compress the sealing surfaces together. This threaded female blind provides a robust, blowout-proof termination point, allowing operators to isolate sections of a manifold or flowline for maintenance or testing without depressurizing the entire system.

Built for durability and ease of use in the field, the 3" 206 Female Blind ensures a reliable mechanical seal and structural integrity for standard-duty oilfield utility lines and production systems.

Features & Benefits

• 2,000 PSI CWP Rating: Ideal for standard-pressure applications in water transfer, air lines, and oil and gas production.

• Forged Steel Construction: Provides high impact resistance and structural durability for long-term field service.

• Precision Acme Threads: Machined to industry standards to ensure smooth engagement and high-torque reliability with the mating wing nut.

• Secondary O-Ring Compatibility: Designed to mate with Fig 206 male subs that utilize an O-ring for superior, bubble-tight sealing.

• Positive Isolation: Offers a safe and immediate dead-end for 3-inch flowlines and manifold branches.

• Rapid Installation: The hammer union design allows for quick make-up and break-out using a standard sledgehammer.

Specifications & Technical Details

Applications

This 3" Figure 206 threaded female blind sub is primarily used in medium-pressure environments requiring frequent connection and disconnection. Typical applications include capping off water transfer manifolds, isolating air lines on drilling rigs, dead-ending production gathering lines, and terminating temporary flowlines in utility services.

Quality Assurance

Each female blind sub is manufactured under stringent quality control protocols. All components undergo precise thread gauging and dimensional inspection to ensure absolute interchangeability with standard 3" Fig 206 hammer unions and reliable blowout-proof performance under rated field pressures.

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