Stainless Steel Slotted Hex Washer Head Sheet Metal Screws

Slotted Hex Washer Head

Why hex washer heads drive better in metal

The hex washer head combines two advantages: the hex lets you drive with a nut driver for higher torque than a Phillips can take without cam-out, and the built-in washer face spreads load for a wide, secure clamp on thin metal. The slot adds the option of a flat blade. This head is a favorite for HVAC, ductwork, and metal building work. Drill a pilot so the threads bite, and use stainless to resist rust outdoors, with 316 for coastal exposure.

Why choose slotted hex washer head sheet metal screws

High torque: hex head drives with a nut driver without cam-out.
Wide clamp: integrated washer face spreads load on thin metal.
Dual drive: the slot also accepts a flat blade.
Corrosion resistance: resists rust in wet and outdoor use.

Common applications for slotted hex washer head sheet metal screws

HVAC and ductwork
Metal building and panel work
Straps, clips, and brackets on sheet metal
Marine and outdoor sheet work (use 316)

For a sealed version on roofing and siding, see stainless hex washer EPDM head screws, and browse every head on the main sheet metal screws category.

Slotted Hex Washer Head Sheet Metal Screws FAQ

How do I drive a hex washer head screw?

Use a nut driver or hex socket sized to the head for high torque. The slot also lets you use a flat blade in a pinch.

Does the washer face replace a separate washer?

Yes. The integrated washer face spreads load, so no separate washer is needed for a wide clamp on thin metal.

Should I use 18-8 or 316?

18-8 suits most outdoor sheet work. For coastal and marine exposure, choose 316 for the best corrosion resistance.