Parker KP78521 Pipe Adapter Bspt X Npt Nptf Steel 6000 Psi

Product Description

The PARKER KP78521 is a straight industrial pipe adapter designed to connect a 3/8-19 female BSPT port to a 3/8-18 male NPT/NPTF port. It is manufactured from steel and rated to a maximum working pressure of 6,000 psi, making it suitable for high-pressure hydraulic and pneumatic plumbing lines. This adapter solves a common cross-standard threading challenge found in industrial and fluid-power systems where British and North American pipe threads must mate. Installation is performed by qualified pipefitters, hydraulic technicians, or industrial maintenance mechanics working on fluid conveyance assemblies.

This adapter is used in industrial fluid-power, hydraulic, and pneumatic piping systems where a BSPT-threaded port must connect to an NPT or NPTF-threaded fitting or component. The straight fitting shape allows for inline installation without altering flow direction. It is appropriate for both stationary industrial equipment and mobile hydraulic applications that operate within the 6,000 psi working pressure rating. Sold in a package quantity of two.

Key Features

• Straight adapter mates 3/8-19 female BSPT to 3/8-18 male NPT/NPTF threads
• Maximum working pressure rated at 6,000 psi for high-pressure fluid-power service
• Steel construction provides durability in demanding industrial environments
• Straight fitting shape supports inline installation without flow-path redirection
• Sold in a package of two units per order

Compatibility

Designed for inline connection between BSPT-threaded female ports and NPT/NPTF-threaded male fittings or components in industrial hydraulic and pneumatic piping systems operating at or below 6,000 psi.

Installation Notes

Installation should be performed by a qualified pipefitter or hydraulic technician following applicable industrial piping codes. Depressurize and isolate the system completely before removing or installing any fittings. BSPT threads seal on the thread form itself and typically require thread sealant, while NPT/NPTF threads may use PTFE tape or anaerobic thread sealant per system requirements. Do not overtighten, as this can damage the thread form and compromise the pressure rating.