S-97763A347 1/4"-20 x 1 1/4" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh environments.
• High tensile strength of 70,000 psi ensures reliable load-bearing capacity in demanding applications.
• Class 3A thread fit provides precise, secure fastening with minimal risk of loosening.
• 5/32" hex drive design allows for easy installation and removal with standard tools.
• Fully threaded UNC coarse threading enables quick assembly and strong holding power.
• Rockwell B55 hardness offers excellent durability and resistance to wear.
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees quality and environmental safety.

Professional Applications & Engineering Value

This 1/4"-20 x 1-1/4" Rounded Head Screw is engineered for high-stress industrial settings, such as machinery assembly, automotive components, and outdoor equipment. Made from Black-Oxide 18-8 Stainless Steel, it combats corrosion and oxidation, extending service life in humid or chemical-exposed environments. The coarse UNC threading and Class 3A fit ensure rapid, vibration-resistant installations, reducing downtime. With a hex drive for torque efficiency and full threading for uniform load distribution, it addresses common issues like stripping and fatigue, making it a dependable choice for engineers prioritizing durability and compliance.

Specification Summary & Compliance

This screw adheres to Class 3A thread fit and UNC coarse thread standards, with precise dimensions including a 1/4"-20 thread size and 1-1/4" length. It meets ASME B18.3 manufacturing specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring no hazardous substances and environmental safety.