S-90015A254 4-40 x 3/4" Stainless Steel Oversized Truss Head Slotted Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance thanks to 18-8 Stainless Steel construction and passivated finish, ideal for harsh environments
• High-strength performance with 80,000 psi tensile strength and Rockwell B85 hardness for reliable, durable fastening
• Secure, low-profile clamping from the wide truss head design, distributing load effectively and reducing surface protrusion
• Easy installation and removal with standard slotted drive, compatible with common tools for efficient assembly
• Precise thread engagement ensured by Class 2A thread fit and UNC coarse threads, providing consistent performance
• Full thread coverage along the 3/4" length for maximum grip and holding power in various material thicknesses
• Compliance with environmental regulations, meeting RoHS 3 and REACH standards for safe, sustainable use

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these 4-40 UNC rounded truss head screws address critical needs in assembly and maintenance. The 18-8 Stainless Steel material, combined with a passivated finish, provides superior resistance to corrosion and oxidation, extending service life in moisture-prone or chemical-exposed applications. The low-profile truss head offers a wider bearing surface, minimizing the risk of surface damage and improving load distribution—ideal for securing thin sheets or plastic components. With coarse UNC threads and a Class 2A thread fit, these screws ensure quick, reliable fastening in metals, plastics, and composites, reducing installation time and enhancing structural integrity in electronics, machinery, and automotive systems.

Specification Summary & Compliance

This screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. It features a 0.505" head diameter, 3/4" length, and fully threaded coarse design. Manufacturing and material specifications comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial markets.