S-91255A628 3/8"-16 x 1 1/2" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating on alloy steel for extended service life in demanding environments
• Exceptional load-bearing capacity with 120,000 psi tensile strength to withstand high-stress applications
• Precise thread engagement with Class 3A fit ensuring reliable, vibration-resistant connections
• Optimized drive efficiency through 7/32" hex drive design providing superior torque transmission
• Enhanced durability with Rockwell C39 hardness maintaining structural integrity under repeated use
• Versatile installation with fully threaded UNC coarse pattern for faster assembly in various materials
• Streamlined profile with rounded button head design reducing snagging while maintaining aesthetic appeal

Professional Applications & Engineering Value

These black-oxide alloy steel rounded head screws deliver critical performance advantages for industrial assemblies requiring both strength and corrosion protection. The 3/8"-16 UNC coarse thread configuration ensures rapid installation in metal, plastic, and composite materials while the Class 3A thread fit provides exceptional vibration resistance in dynamic applications. Engineered with 120,000 psi tensile strength and Rockwell C39 hardness, these hex drive screws maintain clamping force in heavy machinery, automotive systems, and structural frameworks. The combination of fully threaded design and 7/32" hex drive enables efficient installation in confined spaces, making them ideal for maintenance operations and production line applications where reliability and speed are paramount.

Specification Summary & Compliance

Manufactured to precise Class 3A thread tolerances with UNC coarse thread specifications. Fully compliant with ASME B18.3 and ASTM F835 manufacturing standards. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) requirements for industrial use.