B-Line Eaton series data and low support fasteners, Zinc plated, 50 lbs, Steel, 4", 1/4"-20" x 9/16", Used with fasteners for addiitonal support, Thr

The ring opening is 4 inches and the rated load capacity is 50 lb. Fill is what limits you in practice: for data cabling, code and standard practice keep bundles loosely supported so jackets are not deformed, so size the bundle to the ring rather than packing it. At 4 inches this is a main-run ring for larger Cat 5e/Cat 6 bundles or a mix of low voltage and coax, not a single-drop ring.

Yes. The threaded ring is the only part you get, so the mounting hardware is a separate line on the order. Specify a 1/4-20 compatible anchor for your substrate: a threaded insert or rod hanger for concrete deck, a beam clamp with a 1/4-20 tapped hole for structural steel, or a 1/4-20 insert in wood framing. B-Line calls out that it is used with fasteners for additional support.

The ring is steel with zinc plating, which is a dry-interior and light-duty finish. It is fine in conditioned ceilings, plenums, IT rooms and typical warehouse space. For washdown areas, coastal exposure, or anywhere with standing moisture or chemicals, zinc plate will corrode and a stainless or hot dip galvanized support is the better call.

Allow about 4-1/2 inches of vertical clearance. That is the overall height of the BR-64-4T, measured with the 4 inch ring and the threaded stud, before you add whatever anchor or insert it threads into. In a tight plenum above a hard lid, measure to the deck first.

A threaded bridle ring like the BR-64-4T ends in a machine thread (1/4-20 here), so it fastens into a tapped hole, insert, or anchor and can be removed and reinstalled. Nail-on and wood-screw rings drive straight into framing and are a one-shot install. On steel deck, concrete, or anywhere you are hanging from threaded rod hardware, the threaded version is the one that works.

No. The BR-64-4T is a datacomm and low voltage support fastener. Keep line voltage branch circuits in their own raceway or support system and reserve the ring for communications cabling, both for code separation and to avoid induced noise on data runs.