S-98164A421 0-80 x 3/16" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments due to 316 stainless steel construction with passivated finish
• Exceptional thread engagement and vibration resistance from Class 3A precision thread fit with UNF fine threading
• High mechanical strength under load with 70,000 psi tensile strength and Rockwell B55 hardness rating
• Secure, slip-resistant installation using standard 0.035" hex drive tools for consistent torque application
• Reliable regulatory compliance meeting ASME B18.3 standards and RoHS 3/REACH environmental regulations
• Optimized space utilization with low-profile rounded button head design and 3/16" fully threaded length
• Enhanced durability in demanding applications through fully threaded construction and right-hand thread direction

Professional Applications & Engineering Value

This 316 stainless steel rounded head screw delivers critical performance advantages in corrosive and high-stress industrial environments. The combination of UNF fine threading with Class 3A thread fit ensures superior vibration resistance and precise component alignment in machinery, electronics, and marine equipment. The passivated finish significantly enhances corrosion resistance beyond standard stainless steel, making it ideal for chemical processing, medical devices, and outdoor applications. With its hex drive design and rounded button head profile, installation is streamlined while maintaining a low-profile appearance. These industrial screws provide engineers with reliable fastening solutions where material integrity, precision threading, and environmental compliance are paramount considerations.

Specification Summary & Compliance

This precision fastener maintains Class 3A thread fit tolerances per UNF specifications with 0-80 thread size and fine thread spacing. Manufacturing complies with ASME B18.3 standards for dimensional consistency and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial applications requiring strict material restrictions.