S-91773A586 5/16"-18 x 1 1/2" ASME B18.6.3 Stainless Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel and passivated finish for long-lasting performance in harsh environments
• Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for reliable load-bearing applications
• Optimized drive engagement through Phillips No. 3 drive style ensuring efficient installation and reduced cam-out risk
• Precise thread compatibility with UNC coarse 5/16"-18 threads and Class 2A fit for secure fastening in various materials
• Full-threaded design providing maximum grip length and uniform stress distribution along the entire 1-1/2" length
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH
• Enhanced installation efficiency with rounded head profile allowing for smoother driving and reduced surface marring

Professional Applications & Engineering Value

These 5/16"-18 UNC coarse thread screws deliver critical engineering solutions for industrial applications where corrosion resistance and mechanical reliability are paramount. The 18-8 stainless steel construction combined with passivated finish provides exceptional protection against chemical exposure and atmospheric corrosion, making them ideal for manufacturing equipment, food processing machinery, and marine applications. The fully threaded design ensures maximum engagement strength throughout the entire 1-1/2" length, while the Phillips drive with No. 3 size offers reliable torque transmission during installation. The rounded head profile minimizes surface damage and provides a clean aesthetic finish, particularly valuable in applications where fastener appearance matters alongside performance.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse threading (5/16"-18) ensuring consistent performance across industrial applications. These rounded head screws comply with ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming they are free from restricted substances. The combination of 100,000 psi tensile strength and Rockwell B100 hardness ensures reliable performance in demanding mechanical assemblies.