Middle Atlantic RC4CTCBK Poke-Thru Finish Flange & Slide Holder

Overview

The RC4CTCBK is a finish flange and slide holder component for Middle Atlantic's multi-service poke-thru floor system, built to cap and dress out a 4-inch floor penetration where power and communications cabling rise from below-floor infrastructure into a conference room, trading floor, or open-office workstation. It's the visible, walked-on finish piece — the part that determines whether a poke-thru installation looks clean and commercial-grade or looks like an afterthought. Finished in black, the RC4CTCBK is sized for a 4-inch (102mm) hole diameter and is built for floor coverings down to 1/8-inch minimum thickness, which covers most commercial carpet tile, low-pile carpet, and thin resilient flooring installations without requiring a custom trim ring.

Key Features

• 4-inch (102mm) hole diameter: matches standard core-drill and rough-in sizing used across commercial poke-thru installs, so you're not fabricating a custom opening or hunting for a mismatched flange on a retrofit job.
• 1/8-inch minimum floor covering thickness rating: tells the installer up front what floor buildup the flange will seat against cleanly — relevant when coordinating with a flooring contractor on carpet tile or resilient sheet goods before the poke-thru unit goes in.
• Slide holder mechanism: keeps the finish flange positioned and retained against the poke-thru body rather than floating loose in the floor opening, which matters in high-traffic areas like conference rooms and trading floors where the cover gets stepped on daily.
• Black finish: a neutral, low-visibility finish that blends into dark carpet and flooring rather than drawing attention to the penetration point — the standard choice when the room finish isn't polished aluminum or brushed steel.
• TAA compliance: relevant for integrators bidding government, education, or other public-sector projects with Trade Agreements Act sourcing requirements on the purchase order.
• 2.00 lb shipping weight: a compact, single-piece component — no freight planning required, and it ships alongside the rest of a poke-thru order without adding meaningful dimensional weight to the shipment.

Integration & Compatibility

The RC4CTCBK is designed as a finish component within Middle Atlantic's Middle Atlantic poke-thru product line and is intended to pair with a compatible poke-thru floor box body rated for the same 4-inch opening. Because it is a cover/flange element rather than a standalone electrical device, confirm the specific poke-thru unit (power/communications configuration) it will mount to before ordering, since finish flanges are matched to specific poke-thru body families. For projects specifying a full below-floor cabling path, review a PoE and cable planning guide alongside your poke-thru layout to confirm conduit and pathway sizing feeds correctly into the 4-inch penetration. If you're outfitting a room with both floor power/data delivery and ceiling-mounted network devices, pair this against your broader mounting solutions selection for the room to keep hardware sourcing consistent across the install.

What's in the Box

Model RC4CTCBK ships as the finish flange and slide holder assembly in black, sized for the 4-inch poke-thru opening described above.

Frequently Asked Questions

Q: What hole size does the RC4CTCBK require?

A: The RC4CTCBK is sized for a 4-inch (102mm) diameter hole.

Q: What's the minimum floor covering thickness for this flange?

A: It's rated for floor coverings down to 1/8-inch minimum thickness.

Q: Is the RC4CTCBK TAA compliant?

A: Yes, the RC4CTCBK is TAA compliant.

Q: What warranty applies to the RC4CTCBK?

A: It carries a 2-year warranty from date of sale (1-year from installation).

Q: What color finish does the RC4CTCBK come in?

A: Black.

Jerry Tildsen

The RC4CTCBK is the part of a poke-thru install that clients actually see and step on every day, so I pay more attention to the flange sizing than most integrators do. This one's cut for a 4-inch (102mm) hole with a 1/8-inch minimum floor covering rating — that second number is the one people skip and then find out on-site their carpet tile buildup doesn't seat right against the flange.

Technical Highlights:

• 4-inch (102mm) hole diameter: matches standard commercial poke-thru core-drill sizing, so it drops into a typical rough-in without custom trim work.
• 1/8-inch minimum floor covering thickness: coordinate this with your flooring contractor before the poke-thru body goes in — thinner or uneven substrates can leave the flange sitting proud.
• 2.00 lb component weight: light enough that it's a rounding error on freight, but I still call it out on quotes so nobody's surprised it isn't the full poke-thru body.

Deployment Considerations:

• Confirm the specific poke-thru body model this flange pairs to before ordering — finish flanges in this line are matched to a particular unit family, not universal.
• Black finish is the low-visibility choice for dark carpet or dark resilient flooring; if the room finish is lighter, check whether an alternate finish is available before committing to black on a client-facing floor.

I spec the RC4CTCBK on conference room and trading floor poke-thru jobs where the client cares about a clean, finished floor penetration and the flooring is dark commercial carpet tile at or above that 1/8-inch minimum.