Malco HW8X1/2Z-12M Sheet Metal Screw 8x1/2 Zinc 12000

Product Description

The MALCO HW8X1/2Z-12M is a self-piercing hex washer head sheet metal screw designed for fast, reliable fastening in sheet metal fabrication and HVAC ductwork assembly. Sized at number 8 diameter by 0.5 inches in length and zinc plated for corrosion resistance, this screw features a sharp tapered point that pierces sheet metal without pre-drilling. The heat-treated construction ensures the point does not mushroom, break, or walk during installation. The combination lead double thread engages quickly and holds securely. HVAC installers and sheet metal mechanics working in duct fabrication shops or on-site assembly will find this screw suited for high-volume production use. This bulk pail contains 12000 screws.

This screw is used in light-gauge sheet metal joining applications common to HVAC ductwork, fittings, and sheet metal enclosures. The slotted hex washer head allows drive with either a hex driver or flat-blade bit, giving installers flexibility on the job. The undercut-indented hex washer head design provides a burr-free bearing surface that seats flush against the metal. Typical installers include sheet metal mechanics, HVAC technicians, and duct fabricators working on residential and light commercial systems where high fastener volume is required.

Key Features

• Self-piercing sharp tapered point — no pre-drilling required
• Heat-treated construction resists point mushrooming, breakage, and walking
• Combination lead double thread for fast engagement and secure hold
• Burr-free undercut-indented hex washer slotted head for clean seating
• Zinc plated finish for corrosion resistance
• Bulk pail quantity of 12000 screws suited for high-volume production use

Compatibility

Designed for use in light-gauge sheet metal fastening applications including HVAC ductwork fabrication, sheet metal fittings, and metal enclosure assembly.

Installation Notes

Sheet metal mechanics and HVAC technicians typically install these screws using a hex driver or flat-blade bit with a variable-speed drill or screw gun. No pilot hole is required due to the self-piercing point design. Ensure the workpiece is properly supported and clamped before driving to maintain precise hole alignment. Follow applicable SMACNA standards and local mechanical codes for duct assembly fastener spacing and placement.

Technical Specifications

• Nominal Diameter: #8
• Length: 0.5 inches
• Head Style: Hex Washer
• Drive Style: Slotted
• Finish: Zinc Plated
• Process: Heat Treated
• Quantity: 12000 per Pail

Standard Information

• Brand: MALCO
• Manufacturer Part Number: HW8X1/2Z-12M