






🖤 Screw it right, screw it tight — the pro’s choice for flawless fixes!
These #8 x 4-inch drywall and wood screws are precision-engineered from durable 1022a carbon steel with a corrosion-resistant black phosphate finish. Featuring a coarse thread and flat head for a flush fit, they excel in drywall, wood, plastics, and soft metals. Each pack includes 40 self-tapping screws designed for strength, longevity, and versatile use, backed by a lifetime guarantee.



| ASIN | B0CR6C13XL |
| Best Sellers Rank | #7,553 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #59 in Wood Screws |
| Brand | Kuprowin |
| Color | Black |
| Compatible groove diameter | 0.16 Inches |
| Date First Available | December 29, 2023 |
| Exterior Finish | Black Phosphate |
| Fastener Size | #8 x 4 inch |
| Fastener Type | Wood Screws |
| Head Style | Flat |
| Head Type | Flat |
| Item Diameter | 0.16 Inches |
| Item Weight | 10.2 ounces |
| Manufacturer | Leytonda |
| Material | Carbon Steel |
| Number of Pieces | 40 |
| Point Style | Self-Tapping |
| Set Screw Thread Type | UNC |
| Size | #8 x 4" - 40pcs |
| Thread Coverage | Fully Threaded |
| Thread Size | #8 |
| Thread Style | Right Hand |
R**X
Well made.
Well made and perfect size for 3/4" plywood.
P**R
Good length and thread pitch for drywall
These worked perfect for my ceiling panel I had to put back up and screw in
S**.
Good quality
Good quality
C**.
Good product, but better quality control is required
Although these were exactly what I was needing, I had to throw 8 of the 40 away. They were bent (warped) out of the box. Better quality control is required. Was still able to complete my project, however.
1**E
For added strength to my doors.
Replacing the short screws found on most doors with these longer, stronger screws is cheap insurance. I use them on the striker plates, even replacing at least one on each hinge, will make it much harder for a burglar to kick in the door. I had replaced the two short stock sticker plates with a one piece model. This added more strength to the latch and deadbolt. Longer screws allows you you to go deeper into the doors frame where there is more wood. Tips if you do this; drilling a small pilot hole will make it much easier to drive these longer screws. Spraying inside the hole, and screw with WD-40 reduces friction.
A**H
Good
Good
1**1
love
love
S**A
Screws
Worked great for securing a baby gate extender my dogs kept knocking down.
Trustpilot
1 week ago
5 days ago