S-90669A540 1/4"-20 x 3/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
• Exceptional holding power ensured by the precise Class 3A thread fit, minimizing the risk of loosening under vibration.
• Non-marring brass tip protects sensitive surfaces from damage during secure fastening.
• High-strength performance with a Rockwell B80 hardness, providing durability for heavy-duty applications.
• Easy installation and removal using a standard 1/8" hex key, facilitated by the headless design.
• Reliable coarse UNC thread (1/4"-20) for quick assembly and strong engagement in various materials.
• Compliance with industry standards including ASME B18.3, RoHS, and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This 1/4"-20 x 3/4" hex headless set screw is engineered to address critical challenges in industrial assembly, such as component slippage and surface damage. Its 18-8 stainless steel material offers excellent resistance to rust and corrosion, making it suitable for use in machinery, automotive, and outdoor equipment. The Class 3A UNC thread ensures a tight, precise fit that withstands vibrations, while the soft brass tip prevents marring on finished surfaces like shafts or gears. This combination of features provides reliable, repeatable clamping force in applications requiring secure positioning without compromising part integrity, enhancing overall system longevity and reducing maintenance needs.

Specification Summary & Compliance

This set screw features a 1/4"-20 UNC coarse thread with a Class 3A thread fit for high precision and strength. It complies with ASME B18.3 specifications, ensuring dimensional accuracy and performance. Additionally, it is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting environmental and safety regulations for industrial use.