About Rounded Head Screws
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Steel Slotted Oval Head Screws
Also known as wall plate screws, these screws are painted to match the color of a switch or outlet cover. They have a decorative, domed head that sits above the surface when installed. They’re angled under the head so they can be countersunk in a hole. Length is measured from the top of the bevel.
For technical drawings and 3-D models, click on a part number.
| Lg. | Threading | Head Dia. | Head Ht. | Oval Top Ht. | Tensile Strength, psi  | Color | Specifications Met | Pkg. Qty. | Pkg. | |
Painted Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
6-32 | ||||||||||
| 1/2" | Fully Threaded | 0.262" | 0.128" | 0.045" | 60,000 | White | ASME B18.6.3 | 10 | 000000000 | 00000 |
| 1/2" | Fully Threaded | 0.262" | 0.128" | 0.045" | 60,000 | Off-White | ASME B18.6.3 | 10 | 000000000 | 0000 |
| 1/2" | Fully Threaded | 0.262" | 0.128" | 0.045" | 60,000 | Brown | ASME B18.6.3 | 10 | 000000000 | 0000 |
T-Slotted Framing Fasteners
Screw and nut sets or nuts secure brackets and other accessories to rails.
End-feed fasteners slide into the end of the rail to attach components. They form stronger connections than drop-in fasteners because more surface area touches the rail.
Drop-in fasteners fit directly into the T-slot to attach components—no need to disassemble your existing structure. However, they form less secure connections than end-feed fasteners because less surface area touches the rail.
For technical drawings and 3-D models, click on a part number.
Center Hole
and Button Head
Offset Hole and
Button Head
Button head screws are more compact, so they're better for tight spaces than other screws for T-slotted framing.
Offset nuts have a mounting hole close to one end, so you can install them next to corners and rail ends.
For Rail Ht. | Mounting | Screw | Nut | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Single | Double and Quad | Triple | Hole Location | Fastener Thread Size | Fastener Thread Lg. | Color | Material | Color | Material | Pkg. Qty. | Pkg. | |
Single Nut with Button Head | ||||||||||||
| 1", 25mm | 2", 50mm | 3" | Center | 1/4"-20 | 3/8" | Black | Painted Steel | Black | Zinc-Plated Steel | 4 | 0000000 | 00000 |
| 1 1/2", 40mm | 3", 80mm | 4 1/2", 120mm | Offset | 1/4"-20 | 1/2" | Black | Painted Steel | Black | Zinc-Plated Steel | 4 | 0000000 | 0000 |
| 1 1/2", 40mm | 3", 80mm | 4 1/2", 120mm | Offset | 1/4"-20 | 5/8" | Black | Painted Steel | Black | Zinc-Plated Steel | 4 | 0000000 | 0000 |
| 1 1/2", 40mm | 3", 80mm | 4 1/2", 120mm | Offset | 5/16"-18 | 1/2" | Black | Painted Steel | Black | Zinc-Plated Steel | 4 | 0000000 | 0000 |
Self-aligning nuts have a ridge that keeps them centered in the T-slot.
Spring-tab nuts have a flexible tab on the side that holds them in place on vertical rails. It also compensates for different slot depths.
Spring-loaded ball nuts hold themselves in place, so they won’t slide down vertical rails. The ball glides over holes, so they’re easy to reposition.
Button head screws are more compact, so they're better for tight spaces than other screws for T-slotted framing.
Offset nuts have a mounting hole close to one end, so you can install them next to corners and rail ends.
For Rail Ht. | Mounting | Screw | Nut | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Single | Double and Quad | Triple | Hole Location | Fastener Thread Size | Fastener Thread Lg. | Color | Material | Color | Material | Pkg. Qty. | Pkg. | |
Self-Aligning Spring-Tab Nut with Button Head | ||||||||||||
| 1 1/2", 40mm | 3", 80mm | 4 1/2", 120mm | Center | M6 | 12mm | Black | Painted Steel | Silver | Zinc-Plated Steel | 4 | 0000000 | 00000 |
| 1 1/2", 40mm | 3", 80mm | 4 1/2", 120mm | Center | M8 | 12mm | Black | Painted Steel | Silver | Zinc-Plated Steel | 4 | 0000000 | 0000 |
Self-Aligning Spring-Loaded Ball Nut with Button Head | ||||||||||||
| 1 1/2", 40mm | 3", 80mm | 4 1/2", 120mm | Offset | 10-32 | 1/2" | Black | Painted Steel | Silver | Zinc-Plated Steel | 4 | 0000000 | 0000 |
| 1 1/2", 40mm | 3", 80mm | 4 1/2", 120mm | Offset | 10-32 | 5/8" | Black | Painted Steel | Silver | Zinc-Plated Steel | 4 | 0000000 | 0000 |
| 1 1/2", 40mm | 3", 80mm | 4 1/2", 120mm | Offset | 1/4"-20 | 1/2" | Black | Painted Steel | Silver | Zinc-Plated Steel | 4 | 0000000 | 0000 |
| 1 1/2", 40mm | 3", 80mm | 4 1/2", 120mm | Offset | 1/4"-20 | 5/8" | Black | Painted Steel | Silver | Zinc-Plated Steel | 4 | 0000000 | 0000 |
| 1 1/2", 40mm | 3", 80mm | 4 1/2", 120mm | Offset | 5/16"-18 | 1/2" | Black | Painted Steel | Silver | Zinc-Plated Steel | 4 | 0000000 | 0000 |
| 1 1/2", 40mm | 3", 80mm | 4 1/2", 120mm | Offset | 5/16"-18 | 5/8" | Black | Painted Steel | Silver | Zinc-Plated Steel | 4 | 0000000 | 0000 |
| 1 1/2", 40mm | 3", 80mm | 4 1/2", 120mm | Offset | M5 | 8mm | Black | Painted Steel | Silver | Zinc-Plated Steel | 4 | 0000000 | 0000 |
| 1 1/2", 40mm | 3", 80mm | 4 1/2", 120mm | Offset | M6 | 12mm | Black | Painted Steel | Silver | Zinc-Plated Steel | 4 | 0000000 | 0000 |
| 1 1/2", 40mm | 3", 80mm | 4 1/2", 120mm | Offset | M8 | 12mm | Black | Painted Steel | Silver | Zinc-Plated Steel | 4 | 0000000 | 0000 |