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Eaton B-Line series 4Dimension strut channel
Manufacturer Resources
Product Specs
- Certifications:
- Not Applicable
- Channel Type:
- 4D21
- Hole Pattern:
- S
- Material Gauge:
- 18 Gauge
- Product Height:
- 1.06 IN
- Product Length Depth:
- 120 IN
- Product Weight:
- 10.32 LB
- Product Width:
- 2.12 IN
- Department:
- Electrical
- Product Finish:
- Stainless steel type 316
- Product Material:
- Steel
B-LINE 4D21S-120SS6 – Frequently Asked Questions
1) Is this B-Line strut channel stainless steel, and will it hold up outdoors or in a wash-down area?
It is steel with a Type 316 stainless finish. Type 316 is the marine and chemical grade stainless, which is what you specify for coastal exposure, roof-mounted runs, food processing wash-down, and wastewater plants where plain galvanized channel corrodes. If the run is indoors and dry, a plain or pre-galvanized 4Dimension channel covers it for less material cost.
2) What does the S in 4D21S mean, is this slotted strut?
The S is the hole pattern code, and it means the channel is slotted rather than solid back. Slotted channel lets you land a bolt or spring nut anywhere along the run and adjust it after the fact, which is what you want for trapeze hangers and conduit racks that may need to shift. If you need a solid back, for instance where you want maximum section or you are sealing against debris, order the solid pattern of the same 4D21 channel type instead.
3) Do the mounting nuts, bolts and fittings come with this strut channel?
No. The 4D21S-120SS6 is the bare 120 inch channel stick only. Channel nuts, hardware, end caps, post bases and any connecting fittings are ordered separately. If the channel is going into a corrosive location, match the hardware to the Type 316 stainless channel rather than mixing in zinc-plated fasteners, which will corrode first and stain the run.
4) What gauge is the B-Line 4D21 strut channel?
18 gauge steel. That is the lighter-duty end of the strut range, suited to conduit runs, small pipe, cable tray drops, and equipment bracketry rather than heavy trapeze loads. For heavier hangers you would step up to a 12 gauge channel in the same family.
5) Will standard strut nuts and fittings fit the 4D21 channel profile?
The 4D21 channel measures 2.12 inches across the face by 1.06 inches deep, which is the shallow half-height profile in the B-Line 4Dimension line. Strut nuts, clamps and fittings sized for that 1-5/8 inch nominal width family seat in the lips. Fittings cut for the full 1-5/8 inch deep channel will still bolt to it, but any spring nut with a tall spring will bottom out in a 1.06 inch deep section, so use the shallow-channel nuts.
6) I need to match existing strut in my building. How do I confirm this is the same channel?
Match on three things: the profile, the hole pattern and the finish. This one is a 4D21 section, 2.12 inches wide by 1.06 inches deep, slotted back, in Type 316 stainless. Measure the face of your existing channel first. If yours is 1-5/8 inches wide and roughly 1-5/8 deep, it is the full-height profile and this shallower 1.06 inch section will not look or bolt up the same.
7) What is the exact part number to order this Eaton stainless strut?
Order Eaton B-Line part number 4D21S-120SS6. Reading it out: 4D21 channel profile, S slotted hole pattern, 120 inch length, SS6 for Type 316 stainless. If you need a different length or a solid back, the same code structure applies to the rest of the 4Dimension range.
How fast can I get the B-LINE 4D21S-120SS6 delivered?
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Can I return it if it doesn’t work for me?
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reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the B-LINE 4D21S-120SS6 come with a warranty?
Absolutely. The B-LINE 4D21S-120SS6 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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