S-94414A542 1/4"-20 x 1" ASME B18.3, ASTM F835 Alloy Steel Torx Flat Head Screws

Key Features & Benefits at a Glance

• Superior torque transmission and reduced cam-out with the Torx Plus IP30 drive, ensuring reliable fastening in high-stress applications.
• Exceptional tensile strength of 140,000 psi provides reliable performance under heavy loads, minimizing the risk of failure.
• Class 3A thread fit offers precise, tight tolerances for maximum holding power and vibration resistance in demanding environments.
• Black-oxide finish on alloy steel enhances corrosion resistance and durability, extending service life in harsh industrial conditions.
• Fully threaded design ensures consistent grip along the entire length, improving load distribution and assembly integrity.
• 82° countersink angle and flat head profile allow for flush mounting, reducing protrusion and enhancing aesthetic and safety in assemblies.
• Rockwell C39 hardness delivers excellent wear resistance, maintaining thread integrity through repeated use and high-torque applications.

Professional Applications & Engineering Value

These 1/4-20 UNC flat head screws are engineered to address common industrial challenges such as vibration loosening and material fatigue. The black-oxide alloy steel construction, combined with a Class 3A thread fit and Torx Plus drive, ensures secure, tamper-resistant fastening in machinery, automotive, and aerospace assemblies. The coarse thread spacing and fully threaded design provide quick installation and robust holding in materials like metal and hardened plastics, reducing maintenance downtime. Ideal for heavy-duty applications, these screws offer reliable performance where high tensile strength and corrosion resistance are critical, supporting long-term operational efficiency and safety compliance.

Specification Summary & Compliance

This product adheres to precise dimensional standards, including UNC thread type with Class 3A fit for superior thread engagement and 1/4-20 thread size in the inch system. It meets ASME B18.3 specifications for consistent quality and performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material sustainability in industrial use.