Southwire MSTR-50-B Liquid-tight Straight Box Connector

Product Description

The SOUTHWIRE MSTR-50-B is a straight, insulated, liquid-tight box connector designed to secure liquid-tight flexible metal conduit to electrical enclosures and junction boxes. Constructed from malleable iron with a zinc plating, this connector delivers corrosion resistance and mechanical strength in demanding installation environments. The insulated throat protects wire insulation from abrasion at the point of entry. This fitting is installed by licensed electricians on commercial and residential wiring projects where liquid-tight conduit systems are required to maintain moisture and dust exclusion at box terminations.

This connector is suited for use in wet, damp, and industrial locations where liquid-tight flexible conduit is routed into metallic enclosures, panel boxes, or conduit bodies. Typical applications include mechanical rooms, HVAC equipment connections, pump installations, and outdoor electrical equipment where code requires a sealed conduit termination. The straight body style is used where conduit enters the box at a direct angle without requiring a bend at the fitting.

Key Features

• Straight body profile for direct conduit-to-box entry
• Malleable iron construction with zinc plating for corrosion resistance
• Insulated throat protects conductor insulation from abrasion
• Liquid-tight design maintains moisture and dust exclusion at the termination point
• Zinc plated finish suitable for use in damp and wet location applications

Compatibility

Designed as an OEM-style replacement fitting for use with standard liquid-tight flexible metal conduit systems in residential and commercial electrical installations.

Installation Notes

Installation should be performed by a qualified electrician in accordance with NEC requirements for liquid-tight conduit fittings. De-energize all circuits before beginning work on any enclosure or conduit system. Ensure the locknut is tightened securely against the enclosure wall to maintain the liquid-tight seal and proper ground continuity. Do not overtighten to the point of cracking the malleable body.

Technical Specifications

• Material: Malleable Iron, Zinc Plated
• Connector Style: Straight, Insulated
• Length: 14.9 inches
• Height: 5.6 inches
• Width: 9.1 inches
• Weight: 19.55 pounds
• Warranty: One Year Limited
• Country of Origin: China

Standard Information

• Brand: SOUTHWIRE
• Manufacturer Part Number: MSTR-50-B