Acorn SW-MM121G250 Self-drilling Framing Screw 250 Ct

Product Description

The ACORN SW-MM121G250 is a metal-to-metal self-drilling framing screw designed for structural fastening applications where speed and corrosion resistance are critical. Built from hardened C1022 steel with a 1,000-hour Dacro galvanized coating, this screw delivers long-term protection in exposed or outdoor framing environments. The unslotted indented hex washer head with an EPDM (Ethylene Propylene Diene Monomer) bonded washer creates a weathertight seal on metal substrates. The Type 3 self-drilling point eliminates the need for a pilot hole, reducing installation time. Sold in a pack of 250 fasteners.

This screw is suited for metal-to-metal framing connections in light commercial and residential construction, including metal stud framing, steel track systems, and structural panel attachment. The EPDM bonded washer makes it a practical choice for applications where moisture intrusion at the fastener point must be controlled. Installers working on metal roofing, wall panels, or light-gauge steel framing will find the Type 3 drill point effective across a range of substrate thicknesses. The 250-count pack is sized for job-site use.

Key Features

• Hardened C1022 steel construction for high shear and tensile strength in metal-to-metal applications
• 1,000-hour Dacro coating provides superior corrosion resistance compared to standard zinc plating
• EPDM bonded washer seals the fastener point against moisture infiltration
• Type 3 self-drilling point eliminates pre-drilling and speeds up installation
• Unslotted indented hex washer head undercut for consistent drive with a hex bit driver
• 250-count pack suitable for production framing work

Compatibility

Designed as an OEM-style replacement and general-use fastener for metal-to-metal framing assemblies using 12 x 1 inch self-drilling screws with a hex washer head profile.

Installation Notes

Installation is performed with a hex bit driver sized to match the indented hex washer head. Follow applicable building codes and fastener spacing requirements per project specifications when used in structural framing assemblies. Do not overdrive the screw, as excessive torque can damage the EPDM washer and compromise the weathertight seal. Installers should verify that substrate material thickness is compatible with the Type 3 drill point capacity before use.