6405-10-04 O-Ring to Pipe, Male ORB x Female NPT Adapter

6405-10-04 O-Ring to Pipe, Male ORB × Female NPT Adapter

The 6405-10-04 O-Ring to Pipe (Male ORB × Female NPT Adapter) is a hydraulic fitting designed to connect a 7/8-14 Male ORB (-10) port to a 1/4-18 Female NPT (-04) pipe thread. Manufactured from high-strength steel, this straight adapter provides a durable and leak-resistant transition between ORB hydraulic systems and NPT pipe-threaded connections.

The ORB side uses an O-ring boss sealing system, ensuring a secure pressure-tight seal when properly torqued. The NPT side uses female tapered pipe threads, which seal through thread interference combined with thread sealant. This makes the fitting suitable for hydraulic systems requiring reliable ORB-to-NPT conversion in compact and general-purpose fluid applications.

Specifications

• Part Number: 6405-10-04
• Material: Steel
• Shape: Straight
• Thread 1 Type: Male O-Ring Boss (ORB)
• Thread 1 Size: 7/8-14 (-10)
• Thread 2 Type: Female National Pipe Thread (NPT)
• Thread 2 Size: 1/4-18 (-04)
• Sealing Type: O-ring (ORB side) + Thread sealant (NPT side)