Legris 0121 21 17 Hex Plug 1/2x3/8 Mbspt Brass

Product Description

The LEGRIS 0121 21 17 is a brass hex plug designed to seal pipe ends in compressed air, hydraulic, and general industrial fluid systems. Rated to 1,450 psi, this fitting accepts a 1/2 inch male BSPT thread and reduces to a 3/8 inch male BSPT connection, making it a compact solution for closing off or stepping down threaded pipe ports. The hex body provides a standard wrench grip for secure installation. At under 0.1 pounds, the fitting is light but built from solid brass for corrosion resistance in wet or pneumatic environments. Plumbers, pipefitters, and industrial maintenance technicians are the typical installers.

This hex plug is suited for residential and light commercial piping applications as well as industrial fluid and pneumatic distribution systems where BSP (British Standard Pipe Taper) threaded connections are specified. It is commonly used to cap unused ports on manifolds, valves, and pipe tees, or to adapt between two male BSPT thread sizes within the same run. The 1,450 psi pressure rating supports most compressed air and hydraulic service lines found in industrial maintenance and mechanical rooms.

Key Features

• 1,450 psi pressure rating for compressed air and hydraulic service
• 1/2 x 3/8 inch male BSPT (MBSPT) thread configuration
• Brass construction for corrosion resistance in wet and pneumatic environments
• Hex body profile accepts standard open-end or adjustable wrenches
• Compact form factor at 0.099 pounds for easy handling and inventory

Compatibility

Designed as an OEM-style replacement or maintenance fitting for industrial piping systems using MBSPT threaded connections rated for service up to 1,450 psi.

Installation Notes

Installation is performed by a licensed plumber or qualified pipefitter. Always depressurize and isolate the line before removing or installing any threaded pipe fitting. Apply an appropriate thread sealant or PTFE tape to the male threads per the system manufacturer and applicable plumbing code requirements. Do not overtighten; seat the fitting with a wrench to the point of firm resistance without cracking the hex body.