S-91735A409 5/16"-18 x 1/2" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh industrial and marine environments.
• High mechanical strength offering 80,000 psi tensile strength and Rockwell B85 hardness for reliable performance under heavy loads.
• Easy installation and removal with Phillips No. 4 drive and fully threaded coarse UNC design, reducing assembly time.
• Precise thread fit with Class 2A tolerance ensuring secure fastening and vibration resistance in demanding applications.
• Durable rounded pan head provides a low-profile, secure seating surface that resists stripping and damage.
• Compliance with industry standards including ASME B18.6.3, RoHS 3, and REACH for safe, regulated use.
• Versatile 1/2" length and coarse threading enable quick, strong engagement in a variety of materials.

Professional Applications & Engineering Value

Engineered for challenging conditions, these 316 stainless steel rounded head screws deliver exceptional durability where corrosion is a concern, such as in chemical processing, marine equipment, and outdoor structures. The passivated finish enhances surface integrity, while the fully threaded UNC coarse design and Class 2A thread fit ensure rapid, reliable fastening with minimal risk of cross-threading. The Phillips No. 4 drive offers efficient torque transfer, making these screws a top choice for industrial and marine applications that demand both strength and regulatory compliance.

Specification Summary & Compliance

This screw adheres to ASME B18.6.3 specifications, with precise Class 2A thread fit and UNC coarse threading. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and material restrictions are upheld for industrial use.