S-91249A619 5-40 x 1/4" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for harsh environments and extended service life.
• High tensile strength of 70,000 psi ensures reliable performance under load, reducing the risk of fastener failure in demanding applications.
• Fully threaded design provides maximum grip and uniform clamping force along the entire length for secure assemblies.
• Class 2A thread fit offers consistent, easy installation with standard UNC coarse threads, minimizing cross-threading and assembly time.
• Rounded Pan Head with Phillips No. 2 drive allows for flush mounting and efficient torque application with common tools.
• Compliance with ASME B18.6.3 guarantees dimensional accuracy and interchangeability, ensuring compatibility in industrial setups.
• RoHS 3 and REACH compliant for environmentally safe use, meeting global regulatory standards without hazardous substances.

Professional Applications & Engineering Value

This 5-40 UNC Rounded Pan Head Phillips Machine Screw is engineered to address common industrial challenges, such as corrosion-induced degradation and assembly inefficiencies. The Black-Oxide 18-8 Stainless Steel material provides excellent resistance to rust and oxidation, making it suitable for outdoor equipment, marine applications, and chemical processing environments where moisture and corrosive agents are present. The coarse UNC threads and Class 2A fit enable quick, reliable fastening in metals and plastics, reducing installation errors and maintenance downtime. With a fully threaded design and 70,000 psi tensile strength, it ensures robust connections in machinery, electronics, and automotive assemblies, enhancing overall structural integrity and longevity while adhering to strict industry specifications.

Specification Summary & Compliance

This screw features a 5-40 UNC coarse thread with Class 2A thread fit for precise dimensional tolerance, ensuring easy assembly and interchangeability. It is manufactured in accordance with ASME B18.6.3 standards, guaranteeing consistent quality and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it is free from hazardous substances, supporting safe and sustainable industrial use.