S-92210A081 2-56 x 1/2" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
• Exceptional tensile strength of 70,000 psi ensures reliable performance under high-stress conditions
• Precision Class 3A thread fit provides superior engagement and vibration resistance in critical assemblies
• Hex drive design offers secure tool engagement and prevents cam-out during installation
• 82° countersink angle enables flush mounting for clean, professional finishes
• Full threading delivers maximum holding power across the entire fastener length
• Industry compliance with ASME B18.3 standards ensures dimensional accuracy and interchangeability

Professional Applications & Engineering Value

These 2-56 UNC flat head screws with 18-8 stainless steel construction and passivated finish provide critical corrosion protection in demanding industrial environments including electronics enclosures, precision machinery, and marine applications. The hex drive design prevents stripping during high-torque installations, while the Class 3A thread fit ensures precise engagement in tapped holes, eliminating play and vibration-induced loosening. The 82° countersink angle and flat head profile create seamless surfaces in countersunk applications, making them ideal for aerospace components, medical devices, and automotive assemblies where both performance and aesthetics matter.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit for precision dimensional accuracy. The UNC coarse thread spacing and right-hand threading provide reliable fastening performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. Mechanical properties include Rockwell B55 hardness and 70,000 psi tensile strength for demanding industrial applications.