The Elco EAF681 is a high-performance structural self-drilling screw designed for demanding applications requiring strength, ductility, and resistance to embrittlement. This screw features a #12-14 diameter and a length of 1-1/2 inches, making it suitable for various structural fastening needs. The 5/16-inch hex washer head ensures a secure grip and efficient torque transfer during installation. Its #3 point facilitates easy penetration and threading into materials, reducing installation time and effort. Constructed from alloy steel, the EAF681 offers enhanced durability and load-bearing capacity. The Silver Stalgard coating provides superior corrosion resistance, with the ability to withstand 800 hours of salt spray exposure per ASTM B117 standards. This makes it ideal for use in environments where moisture and corrosive elements are prevalent. The dual heat treatment process applied to the EAF681 screw results in a high-hardness point and lead threads for drilling and tapping, while the lower-hardness load-bearing area enhances resistance to hydrogen-assisted stress corrosion cracking. This combination ensures the screw maintains its integrity and performance under stress, extending the service life of the fastening system. The Stalgard coating not only improves corrosion resistance but also enhances galvanic compatibility in dissimilar metal applications, including those involving aluminum. This feature is particularly beneficial in construction projects where different metals are used together, preventing galvanic corrosion and ensuring long-term durability. The EAF681 screw is packaged in bulk quantities of 2,500 units, providing an economical solution for large-scale projects. Its design and material composition make it a reliable choice for applications such as curtain walls, rainscreens, window walls/glazing, and solar panel systems, where structural integrity and resistance to environmental factors are critical.