The Sigma Electric ProConnex 3/8 in. D Die-Cast Zinc Flex Connector is a hard-working BX-style connector engineered to deliver secure, code-ready terminations for flexible conduits in AC, MC and FMC/RWFMC systems. Built with durable die-cast zinc, this connector stands up to real-world use in panels, enclosures, and busy job sites.
Key reasons electricians reach for ProConnex in demanding installations:
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Rugged die-cast zinc construction provides long-lasting durability and reliable performance under vibration, impact, and frequent disconnection/reconnection.
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3/8 in. diameter D-style flex connector designed to fit standard 3/8" flex conduit for a snug, consistent fit.
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Universal conduit compatibility supports AC, MC and FMC/RWFMC cables, making it a versatile choice for mixed wiring environments.
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Triple-listed for confidence UL Listed, CSA Listed and ETL Listed, helping you meet most electrical codes and project requirements.
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BX connector efficiency seals securely to boxes and panels, providing a solid grounding path and minimizing movement over time.
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Bulk packaging comes in a 25-pack, simplifying stock management for contractors, wholesalers, or maintenance crews on larger sites.
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Knockout compatibility suitable for standard 1/2" knockout openings, enabling straightforward mounting in junction boxes and panels.
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Professional-grade reliability delivers consistent torque and a tight seal, reducing the need for repeated adjustments during installation.
Ideal for electricians building or upgrading commercial, industrial, and residential electrical systems, this ProConnex connector helps you maintain clean, secure conduit terminations across mixed cable types. Its durable zinc body resists wear and corrosion, contributing to fewer service interruptions and longer service life compared with lighter-duty alternatives.
How it helps you on the job: use this connector where a robust, code-compliant connection is required between flexible conduit and metal boxes or panels. The 25-pack keeps essential components close at hand, so you can complete installs faster and with fewer trips to the supply closet. When paired with other Sigma Electric ProConnex fittings, you’ll create a cohesive, dependable installation that stands up to daily use and meets stringent electrical standards.
