S-92949A412 3-56 x 1/4" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh environments.
• Exceptional thread engagement and vibration resistance due to Class 3A fine thread fit, ensuring secure, long-lasting assemblies.
• High tensile strength of 70,000 psi provides reliable performance under significant mechanical stress.
• Consistent hardness (Rockwell B55) offers excellent durability and resistance to wear over time.
• Easy installation with hex drive allows for efficient assembly using standard tools.
• Compliance with ASME B18.3 guarantees dimensional accuracy and interchangeability.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory standards.

Professional Applications & Engineering Value

This 3-56 UNF fine thread rounded head screw is engineered for precision assemblies where reliability is non-negotiable. Made from 18-8 stainless steel and featuring a passivated finish, it effectively combats corrosion in demanding environments such as electronics, medical devices, and aerospace components. The Class 3A thread fit and fine threading ensure tight tolerances, reducing the risk of loosening under vibration and enhancing joint integrity. Its hex drive and button head design facilitate easy installation in confined spaces, making it a top choice for applications requiring both strength and precise fastening control.

Specification Summary & Compliance

This screw adheres to ASME B18.3 specifications, with a Class 3A thread fit for high precision. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety. Key dimensions include a 1/4" length, 3-56 UNF fine thread, and a hex drive size of 1/16", all manufactured to exacting standards for reliable performance in industrial applications.