4" 15,000 PSI Fig 1502 Male Blind Sub with Wing Nut & 9/16" Autoclave Port

The 4" Figure 1502 Male Blind Sub with Wing Nut and 9/16" Autoclave (MP) port is a specialized high-pressure closure assembly designed for secure flowline isolation and precision instrumentation access. Rated for 15,000 PSI Cold Working Pressure (CWP), this component is an industry standard for large-bore, high-pressure applications including hydraulic fracturing, well testing, and manifold management.

Manufactured from premium forged alloy steel, this complete assembly includes the male blind sub, heavy-duty wing nut, retainer segments, and snap ring. Unlike standard NPT-tapped blinds, the 9/16" Autoclave port utilizes a high-pressure, metal-to-metal cone and thread design. This connection is specifically engineered to handle ultra-high-pressure environments where elastomeric pipe threads may be prone to leakage or failure. It provides a reliable interface for high-pressure transducers, gauges, or specialized bleed valves, allowing operators to monitor internal line pressure or vent trapped fluids with maximum safety.

Built to withstand extreme mechanical loads, intense vibration, and the erosive nature of abrasive oilfield media, the 4" 1502 Tapped Male Blind ensures absolute structural integrity and bubble-tight sealing in the most demanding 15M pressure systems.

Features & Benefits

• 9/16" Autoclave Port: Provides a high-integrity, metal-to-metal sealing port for ultra-high-pressure instrumentation and bleed-off applications.

• 15,000 PSI CWP Rating: Fully engineered to safely contain extreme pressures in 15M frac manifolds and flowback systems.

• Complete Assembly: Includes the male sub and wing nut, providing a ready-to-use solution for capping 4-inch female threaded hubs.

• Forged Alloy Steel Construction: Delivers exceptional strength and resistance to fatigue, mechanical impact, and internal erosion.

• Standard 1502 Interchangeability: Fully compatible with all industry-standard 4" Figure 1502 hammer union components.

• Enhanced Operational Safety: The Autoclave port allows for secure pressure verification and controlled depressurization before breaking the union.

Specifications & Technical Details

Applications

This 4" Figure 1502 male blind with a 9/16" Autoclave port is essential for operations requiring large-bore flowline termination with a dedicated high-pressure sensing point. Typical uses include mounting electronic pressure transducers on frac manifolds, installing high-pressure bleed-off valves on well-testing lines, and providing a sampling port on 15,000 PSI production systems.

Quality Assurance

Each blind assembly is manufactured under rigorous quality control standards. The 9/16" Autoclave port is precision-machined and gauged to ensure a perfect metal-to-metal seal. The entire unit undergoes non-destructive examination (NDE) and material traceability protocols to guarantee blowout-proof performance under maximum 15,000 PSI field conditions.

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