S-91255A797 5/8"-11 x 3/4" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional durability with 120,000 psi tensile strength and Rockwell C37 hardness, resisting deformation under heavy loads
• Superior corrosion protection from the black-oxide finish, extending service life in demanding industrial environments
• Precision installation ensured by Class 3A thread fit and fully threaded design for maximum grip and vibration resistance
• High-torque capability with 3/8" hex drive and rounded button head, allowing secure fastening in confined spaces
• Reliable coarse thread engagement with 5/8"-11 UNC threading, providing quick assembly and reduced cross-threading risks
• Industry-standard compliance meeting ASME B18.3 and ASTM F835 specifications for consistent quality and interchangeability
• Environmental responsibility with RoHS 3 and REACH compliance, ensuring safe use in regulated applications

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these black-oxide alloy steel screws deliver exceptional performance in machinery assembly, structural frameworks, and equipment manufacturing. The 5/8"-11 UNC coarse thread provides rapid installation while maintaining strong holding power, particularly beneficial in vibration-prone environments. The rounded button head design with 3/8" hex drive offers superior torque transmission and a low-profile finish that minimizes snagging hazards. The combination of Class 3A thread fit and fully threaded construction ensures maximum thread engagement and load distribution, solving common challenges of joint loosening and stress concentration in critical connections.

Specification Summary & Compliance

This rounded head screw features precision 5/8"-11 UNC coarse threads with Class 3A fit for exacting dimensional accuracy. Manufacturing complies with ASME B18.3 and ASTM F835 standards, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting the latest industry requirements for hazardous substance restrictions.