S-91099A210 6-32 x 5/16" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction for extended service life in harsh environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable load-bearing performance
• Precision thread engagement through Class 2A thread fit and UNC coarse threads ensuring secure fastening and vibration resistance
• Optimized flush mounting with 82° countersink angle and undercut flat head design for seamless surface integration
• Enhanced drive stability with Phillips No. 2 drive style providing secure torque transmission during installation
• Full-thread engagement across the entire 5/16" length for maximum holding power in various material thicknesses
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

These 6-32 UNC flat head screws deliver critical engineering solutions where corrosion resistance and flush surface requirements are paramount. The passivated 18-8 stainless steel construction provides exceptional protection against oxidation and chemical exposure, making them ideal for marine, food processing, and outdoor equipment applications. The combination of fully threaded design and coarse UNC threading ensures rapid installation and superior pull-out resistance in various substrates. The undercut flat head profile with 82° countersink angle allows for perfect flush mounting in precision assemblies, eliminating protrusions that could interfere with mechanical operation. These industrial fasteners maintain structural integrity under sustained loads while meeting rigorous ASME B18.6.3 standards for dimensional consistency and performance reliability.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 specifications, these screws feature precision Class 2A thread fit with UNC coarse threads for optimal engagement. The dimensional accuracy includes a head diameter of 0.262" and length of 5/16" with complete threading. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and workplace safety. The mechanical properties include Rockwell B80 hardness and 80,000 psi tensile strength, validated through standardized testing protocols.