S-91783A211 8-32 x 3 1/2" ASME B18.6.3 Stainless Steel Round Head Slotted 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
• Enhanced load-bearing capability with 100,000 psi tensile strength and Rockwell B100 hardness for demanding applications
• Optimized thread engagement through UNC coarse threading and Class 2A fit ensuring reliable fastening in various materials
• Simplified installation and removal with standard slotted drive design compatible with common tools
• Versatile partial threading allowing unthreaded shank section for precise clamping and alignment control
• Regulatory compliance assurance meeting ASME B18.6.3 specifications with RoHS 3 and REACH environmental standards
• Durable rounded head profile providing smooth surface finish and reduced risk of snagging in operational environments

Professional Applications & Engineering Value

This 8-32 UNC partially threaded rounded head screw delivers exceptional engineering value for industrial applications where corrosion resistance and mechanical reliability are paramount. The 18-8 stainless steel composition, enhanced by passivated finish, provides superior protection against chemical exposure and atmospheric corrosion in manufacturing facilities, marine environments, and food processing equipment. The coarse UNC threading ensures rapid installation and secure fastening in softer materials while maintaining vibration resistance. The partially threaded design allows the unthreaded shank to act as a precision pilot, preventing cross-threading and enabling accurate component alignment. With its slotted drive compatibility and rounded head profile, this fastener addresses critical needs in assembly line operations, machinery maintenance, and structural applications where quick access and smooth surfaces are essential for operational efficiency and safety.

Specification Summary & Compliance

This 3 1/2" screw features precision Class 2A thread fit with 8-32 UNC coarse threading and right-hand thread direction, manufactured to exacting dimensional standards. The product fully complies with ASME B18.6.3 mechanical and dimensional specifications, ensuring interchangeability and reliable performance. Environmental compliance is verified through RoHS 3 (2015/863/EU) adherence and REACH (EC 1907/2006) compliance, confirming the absence of restricted substances. The inch system measurements maintain consistency with North American industrial standards, while the partial threading configuration provides 1 1/2" minimum thread length for optimized fastening applications.