S-95345A526 8-32 x 5/16" ASME B18.13 Stainless Steel Pan Head Phillips Screws with External-Tooth Lock Washer

Key Features & Benefits at a Glance

• Vibration-resistant locking: Integrated external-tooth lock washer prevents loosening under dynamic loads, ensuring long-term joint integrity in high-vibration environments.
• Exceptional corrosion resistance: Passivated 18-8 stainless steel construction with matching 410 stainless steel washer provides reliable performance in humid or corrosive conditions.
• High-strength fastening: 70,000 psi tensile strength delivers robust clamping force for demanding industrial applications.
• Precision thread engagement: Class 2A thread fit with UNC coarse threading ensures smooth installation and reliable performance in various materials.
• Optimized drive efficiency: Phillips No. 2 drive design allows for efficient installation with standard tools while minimizing cam-out risk.
• Complete thread coverage: Fully threaded design provides maximum grip length and uniform stress distribution along the entire fastener.
• Regulatory compliance assurance: Meets ASME B18.13 specifications and environmental standards including RoHS 3 and REACH for global project compatibility.

Professional Applications & Engineering Value

Engineered for critical applications where vibration resistance and corrosion protection are paramount, these 8-32 UNC rounded head screws with external-tooth lock washers solve common industrial fastening challenges. The 18-8 stainless steel construction with passivated finish provides superior protection against oxidation and chemical exposure, making them ideal for machinery, electrical enclosures, and outdoor equipment. The pan head design offers excellent bearing surface while the coarse UNC threading ensures reliable performance in softer materials and faster installation. Combined with the 410 stainless steel lock washer, this assembly maintains clamp force in high-vibration environments, preventing costly downtime and maintenance in automotive, manufacturing, and infrastructure applications.

Specification Summary & Compliance

This fastener features precision Class 2A thread fit with UNC coarse threading (8-32 size) and full threading along the 5/16" length. Manufacturing complies with ASME B18.13 specifications for dimensional accuracy and performance. The assembly meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, ensuring suitability for global industrial applications with strict material restrictions.