Middle Atlantic 5515-WH NM TEE 5500 Series Fitting

The Middle Atlantic 5515-WH is a white-finish NM TEE fitting built for the 5500 Series rack and frame system — a structural connector piece used to join rail and frame members at a T-intersection when you're building out a custom rack elevation or equipment framework. If you're assembling or expanding a 5500 Series installation and need the joints to match a white equipment room or AV closet aesthetic instead of standard black, the 5515-WH is the component that gets you there without mixing finishes mid-run.

Overview

Rack and frame builds using Middle Atlantic's Middle Atlantic 5500 Series depend on a small set of fittings — tees, elbows, crosses — to translate straight rail stock into a complete three-dimensional frame. The 5515-WH fills the tee-joint role in that system, finished in white so it disappears into light-colored millwork, control rooms, or branded environments where black rack hardware would stand out. Because it's a system-specific fitting, its value depends entirely on being paired with the correct rail profile and complementary fittings from the same series — mixing frame systems between manufacturers or series is not something this component is designed to accommodate.

Key Features

• 5500 Series Compatibility: Engineered specifically for the 5500 Series frame system, so it seats and locks correctly with the series' rail profile — a generic tee fitting from another rack system will not interface properly, and this is not a universal bracket.
• White Finish: Matches white-painted 5500 Series rail and fittings, which matters when you're building a visible frame in a lobby AV closet, a broadcast environment, or any space where a black frame would clash with the surrounding finish.
• TAA Compliant: Meets Trade Agreements Act sourcing requirements, which is often a hard gate on government, education, and federally funded integration projects — if your project has a TAA compliance line item, the 5515-WH clears it without a workaround.
• T-Junction Structural Fitting: Functions as the connection point where a third rail member meets a run at 90 degrees, letting you build out branching frame geometry (shelving supports, cross-bracing, multi-bay expansions) instead of being limited to a straight run.

Integration & Compatibility

The 5515-WH is a fitting component within the rack mount accessories category, intended to be ordered alongside matching 5500 Series rail sections and other same-series fittings (elbows, crosses, straight couplers) to complete a frame assembly. It is not a standalone mounting solution — plan your full frame bill of materials before ordering so every joint in the run uses compatible 5500 Series parts. For teams speccing an equipment room from scratch, working through a rack planning guide before finalizing fitting counts and rail lengths avoids costly reorders once the frame is partially built. Once the frame is assembled, it typically supports the same shelving, rail-mount, and enclosure hardware used elsewhere in a 5500 Series build, along with cable management accessories sized for the series' rail spacing.

Frequently Asked Questions

Q: Is the 5515-WH TAA compliant?

A: Yes, the 5515-WH is TAA compliant, which supports use on government and federally funded procurement projects with TAA sourcing requirements.

Q: What color finish does the 5515-WH come in?

A: The 5515-WH is finished in white, matching white 5500 Series rail and fittings for a consistent frame appearance.

Q: Can I mix the 5515-WH with fittings from a different rack frame system?

A: No. The 5515-WH is designed specifically for the Middle Atlantic 5500 Series frame system and is intended to be paired with matching 5500 Series rail and fittings.

Q: What does the 5515-WH searched as "5515 WH" refer to?

A: 5515-WH (often searched as 5515 WH) is the same Middle Atlantic NM TEE fitting in the white 5500 Series finish.

Jerry Tildsen

When I'm bidding a 5500 Series frame build for a client who wants a white equipment closet instead of the standard black rack look, the 5515-WH is one of the parts I have to remember to swap in — it's easy to default an entire BOM to black fittings and miss the one white tee the job actually calls for.

Technical Highlights:

• White Finish: Keeps the frame joint visually consistent in white-painted AV closets or broadcast spaces — no odd black tee breaking up an otherwise white frame run.
• TAA Compliance: Clears sourcing requirements on federal and education bids without needing a substitution justification.
• 5500 Series-Specific Geometry: Seats correctly with 5500 Series rail so the T-junction locks tight under load instead of relying on a universal bracket that half-fits.

Deployment Considerations:

• Order the 5515-WH alongside matching white 5500 Series rail and other fittings up front — reordering a single white piece after a black-fitting frame is already assembled means a visible mismatch.
• This is a structural fitting, not a mounting bracket on its own — it only does its job as part of a complete 5500 Series frame assembly.

Right fit for a white-finish AV closet or broadcast control room frame build where every joint, including the 5515-WH tees, needs to read as one consistent white system rather than a mix of finishes.