Parker 12-3/4 F5OF-S Pipe Adapter 5000 Psi Zinc-plated Steel

Product Description

The PARKER 12-3/4 F5OF-S is a straight industrial pipe adapter designed for high-pressure hydraulic and fluid power applications. It transitions between a 1-1/16-12 Male Straight Thread O-Ring (ORFS-style UN/UNF-2A) connection and a 3/4 Male NPTF thread, allowing secure, leak-resistant joins between unlike thread standards. Rated to 5000 psi maximum working pressure, this adapter is constructed from zinc-plated steel for corrosion resistance in demanding service environments. Weighing 0.31 pounds, it is a compact, single-piece straight fitting suited for tight plumbing configurations. Licensed plumbers, hydraulic system technicians, and industrial maintenance professionals typically specify this fitting in mobile equipment, machine tool, and process piping installations.

This adapter is appropriate for use in high-pressure hydraulic circuits, pneumatic systems, and industrial fluid lines where a conversion between straight thread O-ring face seal ports and tapered NPTF pipe threads is required. Typical applications include hydraulic power units, mobile equipment manifolds, and industrial machinery where both connection types appear within the same plumbing assembly. Its straight profile keeps overall installed length predictable. The 1-1/4 inch hex size allows use with standard open-end or combination wrenches during assembly.

Key Features

• 5000 psi maximum working pressure for high-pressure hydraulic and fluid power service
• Male Straight Thread O-Ring x Male NPTF configuration transitions between two common industrial thread standards
• Zinc-plated steel construction provides corrosion resistance in industrial environments
• Straight fitting shape supports direct in-line plumbing with minimal added length
• 1-1/4 inch hex size compatible with standard hand tools
• UN/UNF-2A thread standard on the straight thread end ensures dimensional consistency

Compatibility

Designed as an OEM-style replacement or service fitting for industrial hydraulic and fluid power systems requiring a Male Straight Thread O-Ring to Male NPTF straight adapter at 1-1/16-12 x 3/4 thread sizes.

Installation Notes

This fitting should be installed by a qualified hydraulic technician or licensed plumber familiar with high-pressure fluid system assembly. Depressurize and bleed down the system fully before removing or installing any fittings. The NPTF end relies on thread interference for sealing; use appropriate thread sealant per the system manufacturer and applicable codes. The straight thread O-ring end requires a correctly seated and undamaged O-ring to achieve a leak-free seal — inspect and replace the O-ring if there is any sign of damage before pressurizing.