S-91793A125 5-40 x 5/16" ASME B18.6.3 Stainless Steel Binding 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
• Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for reliable performance under heavy loads
• Optimized installation efficiency through coarse UNC threading and Class 2A fit for faster assembly with reduced cross-threading risk
• Enhanced component protection with wide rounded binding head profile that distributes clamping force evenly
• Universal compatibility with standard slotted drivers for straightforward installation across various applications
• Full-length threading ensures maximum grip and engagement throughout the entire 5/16" length
• Regulatory compliance assurance meeting ASME B18.6.3 specifications while being RoHS 3 and REACH compliant

Professional Applications & Engineering Value

This 5-40 UNC rounded head slotted screw delivers critical engineering advantages for industrial assembly applications. The 18-8 stainless steel material combined with passivated finish provides exceptional resistance to corrosion, oxidation, and chemical exposure, making it ideal for electronics, instrumentation, and marine environments where moisture resistance is paramount. The binding head style with wide profile prevents damage to sensitive components while maintaining secure fastening. With coarse thread spacing and Class 2A fit, installation becomes more efficient with reduced risk of thread stripping, particularly in repetitive assembly operations. The combination of 100,000 psi tensile strength and full threading ensures reliable performance in vibration-prone applications, from control panels to machinery guards.

Specification Summary & Compliance

This industrial fastener maintains precise Class 2A thread fit with UNC coarse threading (5-40 size, 0.125" diameter) and full-length threading across the 5/16" length. Manufacturing and dimensional compliance adhere to ASME B18.6.3 specifications, ensuring interchangeability and reliability. The screw meets stringent environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, making it suitable for global industrial applications with environmental responsibility requirements.