Parker 1JS43-20-20 Female Seal-lok Swivel Fitting

Product Description

The PARKER 1JS43-20-20 is a female Seal-Lok swivel fitting designed for hydraulic hose assemblies requiring a reliable, leak-resistant threaded connection. Built from steel and configured in a straight shape, this Series 43 fitting accepts a 1.25-inch inside diameter hose (hose size 20) and uses a 1-1/4 inch thread size. With an overall length of 3.77 inches, it is sized for industrial and mobile hydraulic systems where a swivel end allows rotational alignment during assembly without stressing the hose. Installation is performed by hydraulic technicians and fluid power specialists working on high-pressure line assemblies.

This fitting is intended for use in hydraulic systems requiring Seal-Lok face-seal swivel terminations on medium-to-large bore hose assemblies. The Seal-Lok interface provides a metal-to-metal face seal that resists leakage under dynamic pressure conditions. It is a common choice in mobile equipment, industrial machinery, and construction hydraulic circuits where hose routing and vibration demand a secure, swivel-capable connection. Compliant with ISO 12151-1 standards, this fitting suits applications where dimensional and performance consistency is required across the assembly.

Key Features

• Female Seal-Lok swivel interface provides face-seal connection resistant to hydraulic leakage
• Steel construction suited to high-pressure hydraulic service environments
• Straight configuration with 1-1/4 inch thread size for direct in-line hose termination
• 1.25 inch inside diameter matches hose size 20 for correct flow area
• Overall length of 3.77 inches supports standard hose assembly clearance planning
• Meets ISO 12151-1 and California Proposition 65 compliance requirements

Compatibility

Designed for use with the following Parker hose series: 187 TC, TC, ST; 302; 304; 387 TC, TC, ST; 422; 424; 426; 436; 471TC; 471ST; 472TC; 482TC; 482ST; 487 TC, TC, ST; 722 TC, TC, ST; 787 TC, TC, ST; 797 TC, TC, ST; and 881 hoses.

Installation Notes

Installation should be performed by a qualified hydraulic technician or fluid power specialist. Depressurize and isolate the hydraulic circuit completely before removing or installing any fittings or hose assemblies. The swivel feature allows the fitting to be oriented during hand-tightening to achieve correct hose routing before final torque is applied. Follow the equipment manufacturer and applicable industry standards for assembly procedures and pressure testing after installation.