Midland Industries 63776 Half Coupling 316 Ss 150 Lb

Product Description

The MIDLAND INDUSTRIES 63776 is a half coupling fitting designed to transition between a female NPT thread and a socket weld end in a single compact body. Built from 316 stainless steel, this fitting handles corrosive service environments where standard carbon steel fittings would degrade. The 1-1/4 in female NPT connection uses a 1-1/4-11-1/2 thread form, while the socket weld end provides a full-penetration weld joint when installed. Rated at 150 lb pressure class, the 63776 is suited for low-to-moderate pressure piping systems. Licensed plumbers and pipefitters install this fitting in process, mechanical, and utility piping where a threaded-to-welded transition is required at the pipe end.

This half coupling is used in residential and commercial mechanical piping systems, as well as light industrial process lines where 316 stainless steel is specified for corrosion resistance. Typical applications include water treatment, chemical handling, food processing support lines, and HVAC hydronic piping. The compact dimensions, approximately 1.85 inches in diameter and 0.86 inches in length, make it well suited for tight installations and panel penetrations where space is limited.

Key Features

• 316 stainless steel construction for resistance to corrosion and oxidizing environments
• Dual-end configuration: 1-1/4 in female NPT on one side, 1-1/4 in socket weld on the other
• 150 lb pressure class rating suitable for low-to-moderate pressure service
• 1-1/4-11-1/2 thread form on the NPT end for standard pipe engagement
• Compact body at approximately 1.85 inches diameter and 0.86 inches length

Compatibility

Designed as an OEM-style replacement or new-install half coupling for 150 lb class stainless steel piping systems using 1-1/4 in female NPT and socket weld connections.

Installation Notes

Installation should be performed by a licensed pipefitter or plumber in accordance with applicable piping codes such as ASME B31.1 or B31.3. Depressurize and isolate the piping system fully before making any threaded or weld connections. The socket weld end requires proper fit-up and a certified weld procedure before applying pressure. Apply thread sealant rated for the intended service on the NPT end only; never apply sealant to the socket weld end.