6405-08-04 O-Ring to Pipe, Male ORB x Female NPT Adapter

The 6405-08-04 Straight Adapter is a rugged and reliable hydraulic fitting designed to bridge connections between an O-Ring Boss (ORB) port and a standard National Pipe Thread (NPT) line. Built to handle heavy-duty applications, this adapter transitions seamlessly from a Male 3/4-16 ORB to a Female 1/4-18 NPT connection.

Manufactured from high-grade steel, it provides exceptional leak protection and durability under high-pressure conditions. The straight-body design makes it an ideal choice for tight hydraulic system layouts where space is at a premium but fluid flow cannot be compromised.

• Part Number: 6405-08-04
• Material: Steel
• Shape: Straight
• Thread 1 Type: Male O-Ring Boss (ORB)
• Thread 1 Size: 3/4-16 (-08)
• 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)