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The MIDLAND INDUSTRIES 7040-04-04 is a straight thread adapter designed to connect female NPT fittings to male BSPT fittings in hydraulic and fluid-transfer systems. Built from steel, this adapter bridges two common thread standards - the 1/4-18 female NPT side and the 1/4-19 male BSPT side - in a single compact body. It measures 1.35 inches in length and weighs 0.1 pounds. Plumbers, hydraulic technicians, and pipefitters working with mixed domestic and international thread standards install this fitting when transitioning between NPT-threaded components and BSPT-threaded ports or equipment.
This adapter is suited for hydraulic lines, fluid control assemblies, and general pipe-fitting applications where a 1/4-inch female NPT port must mate with a 1/4-inch male BSPT connection. It is part of the 7040 Series, which covers female pipe to male BSPT adapters in steel construction. Common install scenarios include machine hydraulics, industrial fluid systems, and equipment imported from regions where BSPT threading is standard.
Designed as an OEM-style replacement or direct-fit adapter for hydraulic and fluid-transfer systems requiring a transition between 1/4-inch female NPT and 1/4-inch male BSPT threaded connections.
Installation should be performed by a qualified plumber, pipefitter, or hydraulic technician following applicable IPC or system-specific pressure guidelines. De-pressurize and drain the line fully before removing or installing any fitting. Apply thread sealant rated for the fluid media and pressure range of the system to the male BSPT threads; note that NPT and BSPT threads are not fully interchangeable in geometry, so verify seat angle compatibility before final assembly. Do not overtighten - hand-snug plus wrench turns appropriate for the fitting size per standard practice.
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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