S-91772A413 5/16"-24 x 1" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from passivated 18-8 stainless steel construction, ensuring long-term reliability in harsh environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for demanding applications
• Precision thread engagement with Class 2A fit and UNF fine threads providing secure, vibration-resistant fastening
• Optimized drive performance featuring No. 4 Phillips drive for efficient installation and reduced cam-out risk
• Full threading design allowing maximum grip length and uniform stress distribution along the entire fastener
• Industry-standard compliance meeting ASME B18.6.3 specifications for consistent quality and interchangeability
• Environmental regulation adherence with RoHS 3 and REACH compliance for global manufacturing applications

Professional Applications & Engineering Value

This 5/16"-24 UNF machine screw delivers critical performance advantages for industrial assembly where corrosion resistance and mechanical reliability are paramount. The passivated 18-8 stainless steel construction provides excellent protection against oxidation and chemical exposure, making it ideal for marine, food processing, and outdoor equipment applications. The UNF fine thread configuration ensures superior clamping force maintenance in vibration-prone environments, while the fully threaded design allows for adjustable positioning and maximum thread engagement. The pan head with Phillips drive offers a low-profile solution with efficient installation capabilities, particularly valuable in confined spaces where socket clearance is limited. These engineering features combine to create a versatile industrial screw solution that addresses common challenges of fastener failure, corrosion-induced maintenance, and assembly efficiency.

Specification Summary & Compliance

This precision fastener maintains Class 2A thread fit tolerances with UNF fine thread specifications (5/16"-24) and is manufactured in accordance with ASME B18.6.3 standards. The product demonstrates full compliance with RoHS 3 (2015/863/EU) restrictions on hazardous substances and meets REACH (EC 1907/2006) requirements for chemical safety. Dimensional accuracy includes a 1" length with 0.313" thread diameter and standard pan head profile (0.615" diameter, 0.218" height), ensuring consistent performance and interchangeability across industrial applications.