S-98164A546 1/2"-20 x 1" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws
Stainless Steel Button Head Hex-Drive Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh chemical and marine environments
- Exceptional tensile strength rated at 70,000 psi ensures reliable performance in high-stress industrial applications
- Precision Class 3A thread fit provides tighter tolerances for secure, vibration-resistant connections in critical assemblies
- Convenient hex drive design with 5/16" drive size enables quick installation and removal with standard tools
- Fine UNF threading (1/2"-20) offers increased thread engagement and improved load distribution
- Durable rounded button head profile combines aesthetic appeal with practical low-profile design requirements
- Full regulatory compliance with ASME B18.3, ASTM F879, RoHS 3, and REACH standards for global industrial acceptance
Professional Applications & Engineering Value
These 316 stainless steel rounded head screws deliver exceptional performance in demanding environments where corrosion resistance and mechanical reliability are paramount. The combination of UNF fine threading and Class 3A thread fit ensures superior vibration resistance and precise alignment in critical assemblies, from chemical processing equipment to marine hardware. The passivated finish enhances surface durability while maintaining the material's inherent resistance to chlorides and acidic conditions. With 70,000 psi tensile strength and Rockwell B55 hardness, these hex drive screws provide reliable fastening in structural applications where failure is not an option, making them ideal for OEM manufacturing, maintenance operations, and precision engineering projects requiring consistent, long-term performance.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit precision and UNF 1/2"-20 fine threading specifications. Compliant with ASME B18.3 and ASTM F879 manufacturing standards. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance. Features include 1" length, 5/16" hex drive, and fully threaded construction for maximum fastening versatility across industrial applications.
