S-98164A425 2-56 x 1/4" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel material, ideal for harsh chemical and marine environments
• Enhanced durability and longevity from passivated finish, providing extra protection against oxidation and wear
• High tensile strength of 70,000 psi ensures reliable performance under heavy mechanical loads
• Precise Class 3A thread fit guarantees secure, vibration-resistant fastening in critical assemblies
• Easy installation and removal with hex drive design, reducing tool slippage and assembly time
• Full compliance with ASME B18.3 standards ensures consistent quality and interchangeability
• RoHS 3 and REACH compliant for safe use in regulated industries, meeting environmental and health standards

Professional Applications & Engineering Value

This 316 Stainless Steel Rounded Head Screw with 2-56 UNC coarse threading is engineered to address common industrial challenges, such as corrosion in aggressive environments and the need for reliable, high-strength fastening. The passivated finish significantly extends service life by resisting chemical attack and surface degradation, while the hex drive and Class 3A thread fit prevent loosening under vibration, making it ideal for precision equipment, electronics, and machinery. Its fully threaded design ensures maximum grip in thin materials, reducing the risk of joint failure and maintenance downtime in demanding applications.

Specification Summary & Compliance

This screw features a 2-56 UNC coarse thread with Class 3A fit for precise dimensional accuracy, a length of 1/4", and a Rockwell B55 hardness. It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industry-standard reliability.