S-91500A303 2-56 x 5/8" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction and passivated finish
• High mechanical strength and durability with a 70,000 psi tensile strength and Rockwell B80 hardness for reliable performance
• Secure and efficient installation with a Phillips No. 1 drive and standard flat head profile for a flush, countersunk fit
• Excellent thread engagement provided by fully threaded UNC coarse threads with Class 2A fit for consistent fastening
• Broad industrial compliance meeting ASME B18.6.3 standards and environmental regulations like RoHS 3 and REACH
• Precision dimensional control ensuring a 5/8" length and 82° countersink angle for accurate, repeatable assembly

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 316 Stainless Steel Flat Head Screws provide exceptional corrosion resistance against chemicals, saltwater, and extreme conditions, making them ideal for marine, chemical processing, and food-grade equipment. The fully threaded UNC coarse thread design ensures maximum grip and vibration resistance in assemblies, while the Phillips No. 1 drive and standard flat head profile allow for quick, flush installations that minimize protrusion. With a passivated finish enhancing surface durability, these machine screws deliver long-term reliability in high-stress environments, reducing maintenance needs and downtime.

Specification Summary & Compliance

This product adheres to Class 2A thread fit for standard tolerance and features a 2-56 UNC coarse thread, 5/8" length, and 82° countersink angle. Manufacturing and dimensional specifications conform to ASME B18.6.3. The screws are compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial use.