Hydraulic Adaptor, 3/8"FB X 1/4"MP

Hydraulic Adaptor, 3/8"FB X 1/4"MP

The 6404X0604 Hydraulic Adapter is a straight hydraulic fitting designed to connect a 3/8" Female SAE O-Ring Boss (ORB) port to a 1/4" Male NPT pipe thread. Built from durable carbon steel and rated for working pressures up to 4000 PSI, this adapter provides a reliable transition between SAE straight-thread O-ring ports and tapered pipe thread connections. The ORB connection uses an O-ring seal for leak-resistant performance, while the NPT tapered thread provides a secure pipe connection. It’s a simple but essential fitting that helps different hydraulic thread styles work together—because hydraulic systems run best when the connections cooperate.

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: 6404X0604
• Product Type: Hydraulic adapter
• Fitting Shape: Straight
• End 1 Type: Female SAE O-Ring Boss (ORB)
• 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
• Connection Configuration: 3/8" FSAE (ORB) x 1/4" MNPT
• Material: Carbon steel
• Working Pressure: Up to 4000 PSI
• Seal Type: O-ring boss seal with tapered pipe thread connection
• Design Purpose: Adapts SAE ORB ports to NPT pipe thread connections

Ideal For

• Hydraulic hose and equipment plumbing
• Agricultural, construction, and industrial hydraulic systems
• Connecting ORB ports to NPT pipe-thread fittings
• High-pressure hydraulic installations requiring durable steel fittings
• Situations where two different thread styles need a reliable translator