S-92360A103 2-56 x 1/4" ASME B18.3, ASTM F835, MIL-DTL-18240 Thread-Locking Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with nylon patch thread locker prevents loosening under dynamic loads, ensuring long-term assembly integrity.
• Exceptional tensile strength of 120,000 psi provides reliable performance in high-stress industrial applications.
• Corrosion-resistant black-oxide finish on alloy steel enhances durability and extends service life in harsh environments.
• Precise Class 3A thread fit ensures smooth installation and secure fastening with reduced risk of cross-threading.
• Wide temperature tolerance from -70° to 250°F maintains locking performance across diverse operating conditions.
• Hex drive design allows for efficient installation with standard tools, reducing assembly time and labor costs.
• Fully threaded shank maximizes grip length and holding power in various material thicknesses.

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 2-56 UNC thread screws with nylon patch thread locker address critical vibration-induced loosening in machinery, electronics, and automotive assemblies. The black-oxide alloy steel construction offers superior corrosion resistance, while the coarse thread design ensures quick engagement in brittle materials. With a Rockwell C39 hardness and fully threaded profile, they provide consistent clamping force where precision and reliability are paramount, reducing maintenance cycles and downtime in high-tensile strength environments.

Specification Summary & Compliance

This rounded head screw features a Class 3A thread fit with UNC coarse threading and complies with ASME B18.3, ASTM F835, and MIL-DTL-18240 specifications. It is fully RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring adherence to environmental and safety standards for global industrial use.