S-98164A230 1/4"-20 x 2" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh environments and extended service life
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness, ensuring reliable load-bearing capacity in demanding applications
• Precise thread engagement through Class 3A fit and UNC coarse threading, providing secure fastening with reduced risk of cross-threading
• Efficient installation and removal with 5/32" hex drive and rounded button head design, allowing for easy access in confined spaces
• Full 2" threading coverage enables maximum grip length and uniform stress distribution across the entire fastener
• Regulatory compliance assurance meeting ASME B18.3 standards, RoHS 3, and REACH for safe use in regulated industries
• Versatile industrial applicability with right-hand thread direction and standardized dimensions for compatibility with existing assemblies

Professional Applications & Engineering Value

This 1/4-20 UNC rounded head screw delivers exceptional engineering value through its 316 stainless steel composition and passivated finish, specifically engineered to combat corrosion in challenging industrial environments. The Class 3A thread fit ensures precise tolerance control, minimizing vibration-induced loosening while the coarse UNC threading provides rapid installation in production settings. With a 70,000 psi tensile strength rating and fully threaded 2" length, this hex drive screw maintains structural integrity under heavy loads, making it ideal for machinery assembly, marine equipment, chemical processing installations, and other applications where corrosion resistance and mechanical reliability are paramount. The rounded button head profile combines aesthetic appeal with functional clearance requirements in modern industrial designs.

Specification Summary & Compliance

This fastener maintains Class 3A thread fit per UNC standards with precise dimensional control including 0.25" thread diameter and coarse thread spacing. Manufacturing adheres to ASME B18.3 specifications for consistent quality and interchangeability. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) requirements, ensuring environmental safety and restricted substance adherence for global industrial applications.