Industrial Self Drilling Screws Zinc Plated Phillips Head for Drywall Wood

For 1/2-inch (12.5mm) drywall on wood studs, the most common size is No.6 x 1-1/4 inch (M3.5 x 32mm). For 5/8-inch (15.9mm) drywall, use No.6 x 1-5/8 inch (M3.5 x 41mm). We stock all standard drywall screw sizes, and can recommend the right spec based on your board thickness.

Yes. The self-drilling point is rated for light-gauge steel studs up to 2.5mm thickness. One screw works for both wood stud and metal stud applications, so you do not need two separate fastener types on the same job.

Coarse thread is for wood studs. Fine thread is for metal studs. We produce both types. If you are not sure which one to order, tell us your stud material and we will recommend the correct thread.

No. We use case-hardened C1022 carbon steel (HV 450 minimum on the surface) and a precision-stamped No.2 Phillips recess. This combination significantly reduces cam-out and stripped heads compared to standard drywall screws, even under high-speed screw gun driving.

They are different. Flat head has a straight countersunk profile and sits flush with the surface. Bugle head has a curved profile that tapers into the drywall without tearing the paper face. We offer both head types. Flat head is better for wood and general construction. Bugle head is better for drywall finishing if you plan to apply joint compound over the screws.