S-91773A081 2-56 x 1/2" ASME B18.6.3 Stainless Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• High tensile strength of 100,000 psi ensures reliable performance in demanding applications without failure
• Precise Class 2A thread fit with UNC coarse threading for easy installation and secure fastening
• Full threading design provides maximum grip and uniform load distribution along the entire length
• Rockwell B100 hardness offers excellent durability and resistance to wear during repeated use
• Phillips drive with No. 1 size allows for efficient torque application and reduced cam-out risk
• Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards

Professional Applications & Engineering Value

These 2-56 UNC rounded head Phillips screws are engineered to address common industrial challenges such as vibration loosening and environmental degradation. Made from 18-8 stainless steel with a passivated finish, they deliver superior corrosion resistance in applications like electronics assembly, machinery, and outdoor equipment. The coarse UNC threads and Class 2A fit ensure quick, secure fastening even in materials prone to stripping, while the fully threaded design enhances holding power. With a rounded head and Phillips drive, they provide a flush finish and easy installation, reducing assembly time and improving reliability in industrial screw applications.

Specification Summary & Compliance

This screw features precise Class 2A thread fit per UNC standards, with dimensions including 2-56 thread size, 1/2" length, and 0.162" head diameter. It complies with ASME B18.6.3 for manufacturing consistency and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.