S-91255A094 3-48 x 3/8" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with Black-Oxide surface treatment, ideal for demanding industrial environments
• Superior tensile strength of 120,000 PSI ensures reliable performance under high-stress applications
• Precision Class 3A thread fit provides secure, vibration-resistant fastening with minimal backlash
• Compact 1/16" hex drive allows for easy installation in confined spaces while maintaining torque capability
• Fully threaded design delivers maximum engagement strength across the entire 3/8" length
• Hardened alloy steel construction (Rockwell C39) maintains structural integrity through repeated use
• Coarse UNC threading enables quick assembly and disassembly while resisting cross-threading

Professional Applications & Engineering Value

These Black-Oxide Alloy Steel Rounded Head Screws with 3-48 UNC Class 3A threading solve critical fastening challenges in precision manufacturing and heavy equipment. The button head profile provides a low-profile, flush-mount solution that eliminates snagging points while the Black-Oxide finish significantly enhances corrosion resistance in humid or chemically aggressive environments. Engineered for industrial applications requiring both strength and precision, these fully threaded screws distribute clamping force evenly across the entire engagement length, preventing joint loosening under vibration. The coarse thread pitch ensures rapid installation in production settings while maintaining the high tensile strength needed for structural components, electronic enclosures, and machinery assemblies where reliability is paramount.

Specification Summary & Compliance

Manufactured to exacting Class 3A thread tolerances with UNC coarse threading (3-48 size) and right-hand thread direction. These screws conform to ASME B18.3 dimensional specifications and ASTM F835 mechanical properties. Fully compliant with RoHS 3 (2015/863/EU) environmental directives and REACH (EC 1907/2006) chemical safety standards, ensuring safe use across global markets. The 1/16" hex drive maintains precise torque application while the 0.188" head diameter provides optimal bearing surface for secure fastening.