S-92360A104 2-56 x 3/8" 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: Nylon patch thread locker ensures secure fastening in high-vibration environments, maintaining clamp load from -70° to 250°F.
• Exceptional strength-to-weight ratio: 120,000 psi tensile strength and Rockwell C39 hardness provide reliable performance under heavy loads without premature failure.
• Superior corrosion protection: Black-oxide coating on alloy steel resists oxidation and extends service life in demanding industrial conditions.
• Precision thread engagement: Class 3A fit and UNC coarse threads enable quick assembly with reduced cross-threading risk and consistent torque values.
• Optimized drive efficiency: Hex drive design with 0.050" drive size offers superior torque transmission and prevents tool slippage during installation.
• Full-thread versatility: Fully threaded 3/8" length provides maximum grip range and adjustment flexibility across various material thicknesses.
• Regulatory compliance assurance: Meets ASME B18.3, ASTM F835, and MIL-DTL-18240 specifications for guaranteed interoperability and quality consistency.

Professional Applications & Engineering Value

Engineered for critical assembly applications, these Black-Oxide Alloy Steel rounded head screws address common industrial challenges including vibration-induced loosening and corrosion degradation. The nylon patch thread locking system maintains fastener integrity in equipment subjected to thermal cycling and dynamic loads, eliminating the need for secondary locking mechanisms. With UNC coarse threads and Class 3A fit, installation speed improves while minimizing thread damage in blind holes. Ideal for electronic enclosures, automotive components, and precision machinery where 120,000 psi tensile strength ensures joint reliability under sustained stress. The combination of hex drive configuration and fully threaded design simplifies maintenance operations while providing consistent clamping force across diverse material substrates.

Specification Summary & Compliance

Manufactured to ASME B18.3, ASTM F835, and MIL-DTL-18240 standards with Class 3A thread fit for precision dimensional compliance. The 2-56 UNC coarse thread configuration ensures optimal engagement in various materials. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Temperature performance certified for -70° to 250°F operational range with maintained mechanical properties.