S-90585A064 3/8"-16 x 2 1/4" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh industrial and marine environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under heavy loads
• Precision thread engagement with Class 3A fit and UNC coarse threads ensuring secure, vibration-resistant fastening
• Optimized flush mounting with 82° countersink angle and standard flat head profile for seamless surface integration
• Efficient installation and removal with 7/32" hex drive design providing superior torque transmission
• Full-threaded reliability offering consistent holding power across the entire 2 1/4" length
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

These 316 stainless steel flat head screws deliver critical performance advantages in demanding industrial applications where corrosion resistance and structural integrity are paramount. The combination of UNC coarse threading and Class 3A thread fit provides superior vibration resistance in machinery, equipment assembly, and structural frameworks. The passivated finish enhances the natural corrosion resistance of 316 stainless steel, making these flat head screws ideal for chemical processing, marine hardware, and food processing equipment where exposure to corrosive elements is common. The 82° countersink angle ensures proper seating in standard countersunk holes, creating flush surfaces that prevent snagging while maintaining aesthetic appeal in visible applications. With full threading along the entire 2 1/4" length, these fasteners distribute clamping force evenly, reducing stress concentration points that can lead to material failure.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 3A thread fit tolerance for superior engagement. Thread specifications conform to UNC 3/8"-16 with coarse thread spacing and right-hand orientation. Mechanical properties include 70,000 psi tensile strength and Rockwell B55 hardness. Compliant with ASME B18.3 manufacturing specifications and meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards.