SFS BMSD4-S3-14 Bi-Metal Self-Drilling Screw - 1/4" x 1-1/8" Hex Washer Head (250 Pack)

The SFS BMSD4-S3-14 is a heavy-duty Bi-Met 300® self-drilling screw engineered for heavy-gauge metal connections, curtain wall systems, building envelope attachments, and other demanding exterior applications. Its bi-metal construction combines corrosion-resistant 304 stainless steel with a hardened carbon steel drill point, delivering exceptional drilling performance while maintaining long-term corrosion resistance.

The SD4 self-drilling point quickly drills and taps threads in metal up to 5/16" thick, helping reduce installation time while providing outstanding holding strength. Silver VistaCoat® provides an additional barrier that helps reduce galvanic corrosion when the fastener is used with aluminum, while the fastener's high ductility helps reduce the risk of delayed embrittlement failures. The hex washer head provides secure tool engagement and dependable load distribution for structural fastening applications.

Key Features

• Designed for heavy-gauge metal connections
• Bi-Met 300® construction combines 304 stainless steel with a hardened carbon steel drill point
• SD4 self-drilling point quickly drills and taps threads in metal up to 5/16" thick
• Higher drilling capacity than conventional stainless steel fasteners
• Silver VistaCoat® helps reduce galvanic corrosion when used with aluminum
• High ductility helps reduce delayed embrittlement failures
• Hex washer head provides secure installation and dependable load distribution
• Suitable for curtain wall, building envelope, and dissimilar-metal connections
• Available sizes: 1/4" x 1-1/8", 1/4" x 1-1/2", and 1/4" x 2"