Metallics JBRHC64 Bolts 1/2-13 X 1-1/4 Hxbt Br (Jar 50)

They run 1/2-13: a 1/2 inch diameter body with 13 threads per inch, which is standard UNC coarse thread. Measured shank outside diameter is 0.4930 to 0.5000 inch, so they take any standard 1/2-13 nut or tapped 1/2-13 hole, including grounding lugs and strut channel nuts cut to that thread.

Solid brass. The material is listed as brass and the head color as brass, so there is no plating to wear through or chip at the wrenching flats. That matters for grounding and bonding work, where brass gives a conductive, corrosion resistant connection, and for damp or outdoor enclosures where plated steel would rust.

Head width across the flats is 0.736 to 0.750 inch, so a 3/4 inch wrench or socket is the fit. Brass heads gall easily, so a six point socket is a better choice than a twelve point or an adjustable.

Fifty bolts per jar, and 50 count is the order minimum, so you buy it as a full jar rather than loose pieces. Total weight of the packed jar is 2186 g. If you need a different length or a different pack quantity in the same brass hex bolt family, Metallics offers other sizes and quantities by request.

That is the use it is built around. The JBRHC64 is a solid brass hex bolt stocked as electrical supply, and brass is used on bonding and grounding hardware because it conducts and resists corrosion without a plated coating in the current path. One caution: brass is softer than steel, so torque it by feel and do not treat it as a structural or load bearing fastener.

Wrenching height is 0.215 inch, which is the usable depth your socket grabs. That is a shallow head, so plan on a thin wall socket where you are working inside strut, a panel gutter, or any confined space, and verify your wrench has full engagement before you pull on it.

Manufacturer part number JBRHC64, from the Metallics JBRHC series of brass hex bolts. Country of origin is China. Order it by JBRHC64 to get the 1/2-13 brass hex bolt in the 50 piece jar rather than another length in the same series.