S-90015A248 4-40 x 3/8" Stainless Steel Oversized Truss Head Slotted Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance through 18-8 Stainless Steel construction and passivated finish for reliable performance in harsh environments
• Superior load distribution with low, wide truss head design that reduces surface pressure and prevents material damage
• High tensile strength rating of 80,000 psi ensures dependable fastening in demanding mechanical applications
• Precise thread engagement with Class 2A UNC coarse threads providing optimal fit and vibration resistance
• Simplified installation using standard slotted drive compatible with common hand tools
• Full threading capability allows complete penetration through materials for maximum holding power
• Regulatory compliance with RoHS 3 and REACH standards for environmentally responsible manufacturing

Professional Applications & Engineering Value

These 4-40 UNC Rounded Truss Head Screws deliver exceptional engineering value across industrial applications where corrosion resistance and reliable fastening are critical. The 18-8 Stainless Steel composition combined with passivated finish provides superior protection against oxidation and chemical exposure, making them ideal for electronics enclosures, machinery panels, and outdoor equipment. The distinctive low, wide truss head profile offers increased bearing surface that distributes clamping force effectively, preventing damage to softer materials while maintaining a low-profile appearance. With coarse thread spacing and Class 2A thread fit, these screws ensure quick assembly and secure fastening in production environments where vibration resistance and durability are paramount. The combination of 80,000 psi tensile strength and Rockwell B85 hardness guarantees these fasteners will maintain integrity under mechanical stress, providing long-term reliability for OEM assemblies and maintenance applications.

Specification Summary & Compliance

This 4-40 UNC Rounded Truss Head Screw features precise dimensional specifications including 3/8" length, 0.505" head diameter, and fully threaded right-hand configuration. Manufactured to UNC thread standards with Class 2A thread fit tolerance for optimal engagement. The fastener complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors while meeting international quality standards for stainless steel fasteners.