S-91773A083 2-56 x 5/8" ASME B18.6.3 Stainless Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh environments
• Reliable fastening performance with Class 2A thread fit ensuring consistent engagement and reduced cross-threading risks
• High mechanical strength offering 100,000 psi tensile strength and Rockwell B100 hardness for demanding applications
• Efficient installation with No. 1 Phillips drive and rounded head design for secure tool engagement and reduced cam-out
• Full thread coverage across the 5/8" length provides maximum grip and uniform stress distribution
• Industry-standard compliance meeting ASME B18.6.3 specifications for dimensional accuracy and interchangeability
• Environmental responsibility with RoHS 3 and REACH compliance, safe for regulated industries

Professional Applications & Engineering Value

Engineered for precision and endurance, these 2-56 UNC rounded head Phillips screws address critical challenges in industrial assembly. The 18-8 stainless steel material, combined with a passivated finish, provides exceptional resistance to oxidation and chemical exposure, making them suitable for electronics, machinery, and outdoor equipment. The coarse UNC thread spacing and fully threaded design ensure rapid installation and robust holding power in materials prone to vibration loosening. With a Rockwell B100 hardness and 100,000 psi tensile strength, they maintain integrity under high stress, reducing maintenance needs and downtime in industrial applications.

Specification Summary & Compliance

This screw adheres to Class 2A thread fit tolerances per UNC standards, ensuring precise dimensional accuracy. Manufacturing follows ASME B18.6.3 specifications for consistent quality. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and suitability for global markets.