S-91773A059 0-80 x 1/2" ASME B18.6.3 Stainless Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ideal for harsh environments.
• Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for reliable, long-lasting fastening.
• Precise, secure thread engagement from the Class 2A thread fit and UNF fine thread design, reducing the risk of loosening under vibration.
• Broad compliance with industry standards including ASME B18.6.3, ensuring dimensional accuracy and interchangeability.
• Environmentally responsible manufacturing with full RoHS 3 and REACH compliance, meeting global regulatory requirements.
• Easy installation and removal with the No. 0 Phillips drive and rounded head design, minimizing tool slippage and damage.
• Versatile fully threaded shank for maximum grip along the entire 1/2" length, suitable for a wide range of material thicknesses.

Professional Applications & Engineering Value

These 0-80 UNF fine thread screws are engineered to address critical challenges in precision assembly, such as maintaining clamp load in vibrating equipment and resisting corrosion in demanding conditions. The 18-8 stainless steel material, combined with a passivated finish, provides excellent protection against oxidation and chemical exposure, extending service life in industrial, electronic, and marine environments. The rounded head and Phillips drive facilitate quick, secure installation without marring surfaces, while the fine thread and Class 2A fit ensure tight, reliable connections that resist back-off. Ideal for applications requiring high-strength, corrosion-resistant fasteners with consistent performance, these screws deliver dependable engineering value in OEM and MRO settings.

Specification Summary & Compliance

This product adheres to precise dimensional and performance criteria, including a Class 2A thread fit for standard clearance and a UNF fine thread with 0-80 size. Manufacturing and quality are governed by ASME B18.6.3 specifications, ensuring uniformity and reliability. The screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming they are free of restricted substances and safe for various industrial uses.