S-91306A349 10-24 x 7/8" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc plating that protects against rust in demanding industrial environments
• Superior load-bearing capability with 120,000 PSI tensile strength for heavy-duty applications requiring maximum durability
• Precise thread engagement with Class 3A fit ensuring reliable, vibration-resistant fastening in critical assemblies
• Optimized installation efficiency through hex drive design providing secure tool grip and reduced stripping risk
• Full-threaded design delivering consistent clamping force along the entire 7/8" length for uniform stress distribution
• Enhanced material integrity with Rockwell C39 hardness maintaining structural stability under repeated stress cycles
• Regulatory compliance assurance meeting ASME B18.3, ASTM F835 standards and environmental regulations for global supply chain compatibility

Professional Applications & Engineering Value

These 10-24 UNC zinc-plated alloy steel rounded head screws address critical engineering challenges in industrial equipment assembly, machinery manufacturing, and structural frameworks. The coarse thread spacing combined with Class 3A thread fit provides exceptional resistance to vibrational loosening in high-stress applications, while the fully threaded design ensures consistent clamping force distribution across the entire fastener length. The zinc-plated surface treatment creates a protective barrier against corrosion in harsh operating environments, extending service life in outdoor equipment, manufacturing facilities, and automotive applications. The rounded button head profile with hex drive compatibility enables flush mounting where clearance is limited while maintaining secure tool engagement during installation.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 3A thread fit per UNC specifications, ensuring tight tolerances for reliable mating with corresponding nuts and threaded holes. These 7/8" length screws feature coarse thread spacing and right-hand threading for standard industrial applications. Compliance includes ASME B18.3 and ASTM F835 manufacturing specifications, with full adherence to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for hazardous substance restriction compliance.