Slotted Round Head Steel Wood Screws

A Slotted Round Head Steel Wood Screws is a type of specialized fastener for wood structures, with a semi-spherical head and a one-way slot at the top. The shank part has a deep tooth profile and wide tooth spacing, and the tail is a conical self-drilling tip. During installation, it is operated with a regular one-way screwdriver, relying on its own wood screw thread to penetrate the wood fibers for fastening. Usually, no pre-drilling is required (except for hard woods or large diameter specifications). After installation, the round head is fully exposed on the workpiece surface, serving both load-bearing and decorative purposes.

Applicable scenarios

Slotted Round Head Steel Wood Screws are suitable for indoor wooden connection scenarios that require manual installation, with the head exposed, and where the appearance requirements are not high but firmness is essential. The main application scenarios are as follows:

（1）Furniture manufacturing and assembly

Connection of the wooden frame of the table and chair and the legs

Fixation of the back panel and side panel of the cabinet

The assembly of the wooden sofa frame

The connection between the bed frame crossbeam and the bed headboard

Fixing of shelf brackets to the wall panel

（2）Interior Decoration and Woodwork

Fixing of wooden door and window frames, baseboards, and decorative wood lines

Installation of wooden wall panels and wall protectors

The connection of wooden ceiling joists

Fastening of stair treads to the keel

Assembly of wooden partitions and fences

（3）Woodworking craftsmanship and model making

Assembly of wooden toys, small wooden boxes, and photo frames

Fixation of wooden model parts

Auxiliary connection of woodworking fixtures and workbenches

（4）Packaging and Transportation

Assembly of wooden pallets, packaging boxes, and crate boxes

Fastening of the sealing plates for the wooden base of heavy equipment

Mon	2.5	3	3.5	4	4.5	5	5.5	6	7	8	10
P	1	12	1.4	1.6	1.8	2	2.2	2.5	2.8	3	3.5
ds min	2.25	2.75	3.2	3.7	4.2	4.7	5.2	5.7	6.64	7.64	9.64
ds max	2.5	3	3.5	4	4.5	5	5.5	6	7	8	10
dk max	4.63	5.8	6.75	7.65	8.6	9.5	10.5	11.05	13.35	15.2	18.9
dk min	4.23	5.3	6.25	7.15	8	8.9	9.9	10.35	12.55	14.4	18.1
k max	1.98	2.37	2.65	2.95	3.25	3.5	3.95	4.34	4.86	5.5	6.8
k min	1.78	2.07	2.35	2.65	2.95	3.2	3.65	3.94	4.46	5.1	6.4
n min	0.6	0.8	0.9	1	12	12	1.4	16	18	2	2.5
n max	0.85	1.05	1.15	1.35	1.55	1.55	1.75	1.95	2.15	2.35	2.85
r	0.2	0.2	0.4	0.4	0.4	0.4	0.4	0.4	0.5	0.5	0.5
t max	1.3	1.54	1.74	1.98	2.2	2.5	2.7	2.8	3.06	3.66	4.32
t min	0.9	1.06	1.26	1.38	16	1.9	2.1	2.2	2.34	2.94	3.6

FAQ

（1）Can these Slotted Round Head Steel Wood Screws be used again after being removed?

If the screw is removed without damaging the threads or grooves, then it can be reused in the same or similar wooden holes.

（2）Do these Slotted Round Head Steel Wood Screws have threaded sections?

Yes. The standard product is fully threaded, but we can also offer products with partial threading.

（3）Do I have to drill holes before using these screws?

For softwoods like pine or cedar, or if the screw is on the smaller side, you usually don’t need to drill a hole first.

For hardwoods like oak, maple, or teak, or if you’re using a larger diameter screw, it’s better to drill a pilot hole. Make the hole about 70–80% of the screw’s core diameter.

（4）Can I use these screws outdoors?

If you’re using them outside, we recommend stainless steel screws.

You could also go with carbon steel, but then you’d need to give them a Dacromet or hot‑dip galvanizing coating. That keeps them from rusting when left outdoors.

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