S-91255A238 10-24 x 1/4" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the Black-Oxide finish on Alloy Steel extends service life in demanding environments, minimizing maintenance needs.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, enhancing overall joint integrity.
• Convenient 1/8" hex drive allows for easy installation and removal with standard tools, speeding up assembly processes.
• Fully threaded coarse UNC design enables quick engagement and strong holding power in various materials, improving efficiency.
• High hardness (Rockwell C39) offers excellent wear resistance, ensuring durability under repeated use and load conditions.
• Compliance with ASME B18.3 and ASTM F835 guarantees consistent quality and interoperability, supporting standardized engineering requirements.

Professional Applications & Engineering Value

These 10-24 UNC Class 3A Black-Oxide Alloy Steel Rounded Head Screws are engineered to address common industrial challenges, such as vibration loosening and corrosion in harsh settings. The coarse thread spacing and fully threaded design provide rapid installation and robust clamping force, ideal for machinery, automotive, and electronics assemblies where reliability is critical. The Black-Oxide surface treatment on Alloy Steel not only enhances corrosion resistance but also reduces galling, ensuring smooth fastening operations. With a rounded button head and right-hand thread orientation, they offer a low-profile, secure fit that minimizes protrusion and distributes stress evenly, making them perfect for confined spaces and high-vibration applications. This combination of material strength, precise thread fit, and protective coating delivers long-term performance, reducing downtime and maintenance costs in professional environments.

Specification Summary & Compliance

This screw features a 10-24 UNC thread size with Class 3A precision for tight dimensional accuracy and superior fit. It adheres to ASME B18.3 and ASTM F835 manufacturing standards, ensuring consistent quality and performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental safety and regulatory requirements in industrial supply chains.