S-91306A295 3/8"-24 x 1/2" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated alloy steel construction for extended service life in harsh industrial environments
• Exceptional load-bearing capacity with 120,000 psi tensile strength and Rockwell C39 hardness for heavy-duty applications
• Precise thread engagement with Class 3A UNF fine threads ensuring secure, vibration-resistant connections
• Easy installation and removal with 7/32" hex drive and rounded button head design requiring minimal clearance
• Maximum holding power through fully threaded design distributing stress evenly across the entire fastener length
• Reliable performance standardization meeting ASME B18.3 and ASTM F835 specifications for consistent quality
• Environmental compliance assurance with RoHS 3 and REACH certifications for safe, regulated usage

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 3/8"-24 UNF Class 3A zinc-plated alloy steel rounded head screws deliver critical performance advantages in machinery assembly, automotive components, and heavy equipment manufacturing. The fine thread spacing provides superior resistance to vibrational loosening, while the fully threaded design ensures maximum grip length in thin materials and tight spaces. The zinc-plated surface treatment creates a protective barrier against corrosion, significantly extending service life in challenging environments. With right-hand threading and hex drive configuration, these fasteners enable quick installation and maintenance access, reducing assembly time and improving operational efficiency in production lines and field service applications.

Specification Summary & Compliance

This high-performance fastener features precise Class 3A thread fit with UNF (Unified National Fine) thread form ensuring tight tolerances and reliable engagement. Manufacturing complies with ASME B18.3 and ASTM F835 standards, guaranteeing dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance for restricted substance control and REACH (EC 1907/2006) regulations for chemical safety, making it suitable for global industrial markets and environmentally conscious applications.