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The MIDLAND INDUSTRIES SS6900-24-24 is a stainless steel O-ring swivel adapter designed to connect a 1-1/2 inch Male O-Ring Boss (MORB) fitting to a 1-1/2 inch Female NPSM swivel connection. Built from 316 stainless steel, this adapter provides corrosion resistance suited for demanding fluid and gas system applications. At 2.35 inches in length, it is a compact inline fitting. The thread specifications are 1-7/8-12 on the male O-ring boss end and 1-1/2-11-1/2 on the female NPSM swivel end. It is rated for operating temperatures up to 1000 degrees F, making it appropriate for high-temperature service environments. Licensed plumbers, pipefitters, and industrial maintenance technicians are the primary installers of this fitting.
The SS6900-24-24 is used in industrial piping, hydraulic, and fluid transfer systems where a sealed, swivel-capable transition between MORB and NPSM threaded components is required. The swivel design allows rotational adjustment during assembly, reducing stress on connected lines. This fitting is suited for both new construction and retrofit installations in commercial and industrial settings where 316 stainless steel construction is specified for corrosion resistance or sanitary requirements.
Designed as an OEM-style stainless steel swivel adapter for piping systems requiring a 1-1/2 inch Male O-Ring Boss to 1-1/2 inch Female NPSM swivel connection in the SS6900 Series.
Installation should be performed by a licensed plumber or pipefitter following applicable IPC or facility-specific piping codes. Depressurize and drain the system completely before removing or installing any fitting. Inspect the O-ring sealing surface for damage before assembly and replace the O-ring if worn. Do not overtighten the swivel connection; hand-tighten first, then snug with appropriate wrenches to achieve a leak-free seal without distorting the fitting body.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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