Female Pipe Thread Hydraulic Pipe Cap, 3/8"

Female Pipe Thread Hydraulic Pipe Cap, 3/8"

The 5406C06 Female Pipe Thread Hydraulic Pipe Cap is a heavy-duty 3/8" FNPT cap designed to securely seal male pipe thread fittings in high-pressure hydraulic systems. Constructed from durable carbon steel and rated up to 6,000 PSI, it provides dependable sealing performance in demanding equipment and fluid power applications. The hex exterior allows easy installation with standard tools, making it simple to cap off lines, ports, or fittings when a secure seal is required—because a properly capped fitting keeps hydraulic fluid where it belongs and prevents contamination from sneaking in.

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: 5406C06
• Product Type: Female pipe thread hydraulic cap
• Thread Type: Female NPT (FNPT)
• Thread Size: 3/8 in – 18 FNPT
• Tube OD Reference: 3/8 in
• Material: Carbon steel
• Pressure Rating: Up to 6,000 PSI
• Hex Size: 7/8 in
• Length: 1.03 in
• Design Purpose: Caps male NPT fittings to seal hydraulic lines or ports
• Construction Benefit: Carbon steel body provides durability in high-pressure systems

Ideal For

• Capping unused male pipe thread fittings
• Hydraulic system maintenance and service
• Agricultural, industrial, and construction equipment
• Hydraulic line isolation during repairs
• Situations where a solid cap keeps hydraulic systems sealed instead of letting oil escape and make a mess of the shop floor