S-93310A710 1/2"-13 x 1" 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 security with permanent Nylon Patch locking that maintains effectiveness across a wide temperature range (-70° to 250° F)
• Superior corrosion resistance through 18-8 Stainless Steel construction, ideal for harsh industrial environments
• High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Precise thread engagement with Class 3A thread fit ensuring reliable fastening in critical assemblies
• Easy installation and removal via standard 5/16" hex drive design with rounded button head profile
• Industry-standard compatibility with UNC coarse threading (1/2"-13) for broad application across equipment and machinery
• Regulatory compliance meeting ASME, ASTM, and military specifications while being RoHS 3 and REACH compliant

Professional Applications & Engineering Value

Engineered for vibration-resistant applications where fastener security is critical, these 18-8 Stainless Steel rounded head screws solve the persistent challenge of loosening under dynamic loads. The Nylon Patch locking technology provides permanent resistance to vibration-induced back-off while maintaining performance across extreme temperature fluctuations from -70° to 250° F. The Class 3A thread fit ensures precise engagement in industrial equipment, machinery assemblies, and automotive components where tolerance stack-up can compromise joint integrity. With fully threaded UNC coarse threading and hex drive installation, these fasteners deliver reliable clamping force in high-stress environments while the rounded button head profile provides a finished appearance with reduced snagging risk.

Specification Summary & Compliance

This 1/2"-13 x 1" locking rounded head screw features precision UNC coarse threads with Class 3A thread fit for superior engagement. Manufacturing complies with ASME B18.3, ASTM F879, and MIL-DTL-18240 specifications, ensuring consistent quality and performance. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications requiring certified components.