S-93310A196 8-32 x 5/8" ASME B18.3, ASTM F879, MIL-DTL-18240 Thread-Locking Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with nylon patch ensures secure fastening in high-stress environments, preventing loosening under dynamic loads.
• Superior corrosion resistance from 18-8 stainless steel construction extends service life in humid or chemically aggressive industrial settings.
• High tensile strength of 70,000 psi provides reliable load-bearing capacity for critical mechanical assemblies.
• Wide temperature tolerance (-70° to 250°F) maintains locking integrity across extreme operational conditions.
• Precision Class 3A thread fit guarantees consistent engagement and reduced risk of cross-threading during installation.
• Hex drive design with 3/32" drive size enables efficient torque application and streamlined assembly processes.
• Full regulatory compliance with ASME, ASTM, and military standards ensures interoperability and quality assurance.

Professional Applications & Engineering Value

Engineered for demanding applications where vibration-induced failure is a primary concern, these nylon patch locking screws deliver exceptional reliability in machinery, automotive subsystems, and electronic enclosures. The 18-8 stainless steel composition provides inherent resistance to oxidation and chemical degradation, making these rounded head screws ideal for outdoor equipment or marine-adjacent installations. Combined with UNC coarse threading and Class 3A tolerance, the fastener ensures rapid assembly while maintaining precise thread engagement. The temperature-stable nylon patch locking mechanism remains effective across industrial thermal cycles, eliminating the need for secondary adhesives. These characteristics make the 8-32 x 5/8" screw a versatile solution for OEMs and MRO professionals seeking durable, self-locking hex drive fasteners.

Specification Summary & Compliance

This fastener maintains Class 3A thread fit per UNC standards with full threading along its 5/8" length. Manufacturing conforms to ASME B18.3, ASTM F879, and MIL-DTL-18240 specifications. The product is verified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for hazardous substance restrictions.