L.H. DOTTIE GBL50 Conduit Bushing 1/2 in Threaded Aluminum Pre-Galvanized

Conduit bushing for half-inch threaded runs

The L.H. DOTTIE GBL50 is a pre-galvanized aluminum bushing designed to protect conductors where they enter a half-inch threaded conduit hub. It suits electricians and maintenance crews finishing rough-in work on commercial or residential jobs. The smooth bore prevents insulation damage during cable pulls. This fitting meets the basic need for a code-compliant entry point in metallic raceway systems.

Corrosion resistance and low thermal mass

Pre-galvanized aluminum surfaces resist moisture and oxidation in damp locations without adding significant weight to the assembly. The metal conducts heat away from conductors during normal load cycles, helping to keep insulation within rated temperatures. No moving parts or seals mean silent operation and no degradation from vibration. The bushing installs with standard hand tools and requires no external power.

Half-inch trade size defines fit

The single specification that decides suitability is the half-inch trade size, which must match the conduit and hub diameter exactly. A mismatch leaves conductors exposed or prevents the fitting from seating. Buyers working with three-quarter-inch or one-inch raceways need a different bushing. No other dimension or rating in the data overrides this size requirement.