Dayco 144650 -4 O-Ring Male ORB Hydraulic Port Plug Fitting

The Dayco 144650 is a -4 dash size O-Ring Male (ORB) port plug, designed to seal unused or open O-Ring Boss ports in hydraulic systems. Identified by Dayco's standard part designation 04OM-PLUG, this fitting uses a -4 (1/4") thread size with an O-ring seal to provide a leak-free blanking solution for hydraulic circuits.

Constructed of high-strength steel and/or brass consistent with Dayco's hydraulic adapter line, this plug is compatible with standard ORB (O-Ring Boss) port configurations per SAE J1926. It is suited for use in mobile hydraulic equipment, industrial machinery, and fluid power systems where port sealing is required during service, storage, or system reconfiguration.

Key Features:

• Dash Size: -4 (1/4" nominal hose/port size)
• Port Style: O-Ring Male (ORB / O-Ring Boss) — SAE J1926
• Function: Blanking plug to seal unused hydraulic ports
• Seal Type: O-ring face seal for leak-free port closure
• Material: Steel and/or brass construction
• Compatible with Dayco Permanent Crimp Coupling systems and standard ORB port equipment
• Helps maintain system pressure integrity and prevents contamination ingress

The Dayco 144650 port plug is an essential component for hydraulic system maintenance and assembly, ensuring clean, sealed ports wherever a -4 ORB connection is not in active use.