Parker 10143-8-4 Hydraulic Hose Mpt Fitting 0.25 in Nptf

Product Description

The PARKER 10143-8-4 is a straight male pipe thread (MPT) fitting designed for hydraulic hose assemblies. It connects hose ends to threaded ports in hydraulic systems using an NPTF thread form, which relies on thread interference for a pressure-tight seal without a separate sealing element. The fitting is sized for hoses with a 0.25 inch inside diameter (hose size 4) and uses a 1/2-14 thread. Overall length is 2.13 inches. Constructed from steel, it is suited for industrial and mobile hydraulic circuits where robust, leak-free connections are required. Licensed plumbers, pipefitters, and hydraulic technicians are the typical installers.

This fitting is designed for use with a broad range of Parker hydraulic hose series including the 187, 302, 304, 387, 422, 424, 426, 436, 471TC, 471ST, 472TC, 482TC, 482ST, 487, 722, 787, 797, and 881 hose lines in TC and ST configurations where applicable. It is applicable to both industrial and mobile equipment hydraulic systems wherever a size-4 hose terminates at an NPT-threaded port. The straight configuration makes it appropriate for inline connections where hose routing does not require an angled adapter.

Key Features

• NPTF thread form provides a metal-to-metal pressure-tight seal at the 1/2-14 thread interface
• Straight body configuration for direct inline hose-to-port connections
• Steel construction for durability in high-pressure hydraulic service
• Sized for 0.25 inch ID hoses (Parker hose size designation 4)
• 2.13 inch overall length suits standard hose end assembly clearances
• Compatible with a wide range of Parker TC and ST hose series

Compatibility

Rated for use with Parker 187, 302, 304, 387, 422, 424, 426, 436, 471TC, 471ST, 472TC, 482TC, 482ST, 487, 722, 787, 797, and 881 hoses in TC and ST configurations, with a 0.25 inch inside diameter and a 1/2-14 NPTF threaded connection.

Installation Notes

Hydraulic fittings should be installed by qualified hydraulic technicians or pipefitters. Depressurize and de-energize the hydraulic system completely before removing or installing any fittings. NPTF threads rely on thread engagement for sealing — inspect threads for damage before assembly and apply appropriate thread sealant per system requirements. Ensure hose and fitting are compatible in pressure rating before returning the system to service.