S-94135A825 1/4"-20 x 1 1/2" Tamper-Resistant Drilled Spanner Stainless Steel Truss Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance through 18-8 Stainless Steel construction and passivated finish, ensuring long-term reliability in harsh environments.
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B87 hardness for demanding applications.
• Secure, tamper-resistant fastening provided by the drilled spanner drive and wide truss head design, distributing load effectively.
• Precise, reliable thread engagement with Class 2A fit and coarse UNC threading for quick assembly and vibration resistance.
• Full-length threading ensures maximum grip and holding power along the entire 1-1/2" length.
• Regulatory compliance with RoHS 3 and REACH standards, making it safe for various industrial and international markets.
• Versatile industrial use due to its robust design, suitable for machinery, enclosures, and structural assemblies.

Professional Applications & Engineering Value

This 1/4"-20 UNC Rounded Truss Head Screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and high-stress demands. The 18-8 Stainless Steel material, combined with a passivated finish, provides excellent resistance to rust and chemical exposure, making it ideal for outdoor, marine, or chemical processing equipment. The wide truss head offers a larger bearing surface, reducing surface pressure and preventing damage to softer materials, while the drilled spanner drive allows for secure installation in confined spaces. With coarse thread spacing and Class 2A thread fit, it ensures rapid assembly and maintains integrity under dynamic loads, serving critical roles in automotive, construction, and heavy machinery where durability and compliance with RoHS and REACH are paramount.

Specification Summary & Compliance

This screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy and ease of assembly. It is fully threaded with a coarse thread spacing and measures 1-1/2" in length. Manufactured from 18-8 Stainless Steel with a passivated finish, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and suitability for global industrial applications.