S-91858A848 8-32 x 5/8" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction and passivated finish for extended service life in harsh environments
• Exceptional mechanical strength delivering 70,000 psi tensile strength and Rockwell B80 hardness for reliable heavy-duty applications
• Precision thread engagement with Class 2A fit and UNC coarse threading ensuring secure fastening and vibration resistance
• Optimized flush mounting featuring standard 82° countersink angle for seamless surface integration and professional appearance
• Full-threaded design providing maximum grip length and load distribution across the entire fastener
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH
• Slotted drive convenience enabling quick installation and removal with standard screwdriver tools

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 8-32 UNC flat head screws in 316 Stainless Steel provide critical corrosion resistance where exposure to chemicals, moisture, or salt spray would compromise ordinary fasteners. The passivated finish enhances surface durability while maintaining electrical conductivity, making these flat head machine screws ideal for electrical enclosures, marine hardware, and food processing equipment. The Class 2A thread fit ensures consistent assembly performance in high-vibration applications, while the standardized 82° countersink angle guarantees proper seating in precision-machined components. These fully threaded industrial fasteners deliver maximum clamping force distribution, preventing joint failure in structural assemblies and machinery where reliability is paramount.

Specification Summary & Compliance

This 5/8" flat head screw features UNC coarse threads with Class 2A tolerance for consistent fit and reliable performance. Manufactured to ASME B18.6.3 specifications, the fastener ensures dimensional accuracy and interchangeability. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental responsibility and material safety. The inch system measurements maintain precision across all critical dimensions including head diameter (0.312"), thread diameter (0.164"), and overall length (5/8"), providing engineers with reliable specifications for design and procurement.