Hydraulic Male Adaptor, 3/8"MB X 1/4"MP

Hydraulic Male Adaptor, 3/8"MB X 1/4"MP

The 6401X0604 Hydraulic Male Adaptor (3/8" MB x 1/4" MP) is a straight hydraulic fitting designed to connect SAE O-Ring Boss (ORB) ports to NPT pipe thread connections in high-pressure hydraulic systems. Constructed from durable carbon steel and rated for working pressures up to 4,000 PSI, this adapter provides a dependable transition between hydraulic components. The ORB end uses an O-ring seal for secure, leak-resistant performance, while the NPT side offers a tapered pipe thread connection, making it a reliable solution when hydraulic systems need to connect different thread standards—because oil belongs in the system, not decorating the shop floor.

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: 6401X0604
• Product Type: Hydraulic male adapter fitting
• Fitting Shape: Straight
• End 1 Type: Male SAE ORB (O-Ring Boss)
• End 1 Size: SAE 6 (9/16"-18 ORB)
• End 2 Type: Male NPT
• End 2 Size: 1/4" NPT (1/4"-18 tapered pipe thread)
• Working Pressure: Up to 4,000 PSI
• Material: Carbon steel
• Seal Type: O-ring seal on ORB side for reliable leak prevention
• Function: Connects SAE ORB ports to NPT threaded hydraulic lines or components

Ideal For

• Hydraulic hose and equipment connections
• Systems requiring SAE ORB to NPT thread transitions
• Agricultural, construction, and industrial hydraulic systems
• Repairs where high-pressure durability and reliable sealing are required
• Mechanics who know that the correct adapter beats creative pipe-thread improvisation every time