S-91440A209 8-32 x 2 1/2" ASME B18.6.3 Steel Round Head Combination Phillips/Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, ensuring long-lasting performance in demanding industrial environments
• Enhanced driving versatility through combined Phillips/Slotted drive, accommodating various tools and reducing installation time
• Reliable thread engagement with UNC coarse threading and Class 2A fit, providing secure fastening and vibration resistance
• High load-bearing capacity from 60,000 psi tensile strength and Rockwell B70 hardness, suitable for heavy-duty applications
• Full-threaded design offering consistent grip along the entire 2-1/2" length for maximum holding power
• Industry-standard compliance with ASME B18.6.3 specifications, ensuring dimensional accuracy and interchangeability
• Environmental responsibility through RoHS 3 and REACH compliance, meeting strict regulatory requirements

Professional Applications & Engineering Value

This zinc-plated steel rounded head screw delivers exceptional engineering value across industrial applications where corrosion resistance and mechanical strength are critical. The combination of UNC coarse threading and Class 2A thread fit ensures rapid installation while maintaining precise tolerances in machinery assembly, electrical enclosures, and structural frameworks. The Phillips/Slotted drive system provides flexibility for both automated and manual installation processes, reducing tooling requirements in manufacturing environments. With its fully threaded design and 60,000 psi tensile strength, this fastener effectively distributes clamping forces in sheet metal, plastic components, and wood assemblies, preventing loosening under dynamic loads. The rounded head profile minimizes surface damage while the zinc plating offers sacrificial protection against environmental degradation.

Specification Summary & Compliance

Manufactured to precise inch system dimensions with Class 2A thread fit tolerances per ASME B18.6.3 standards. Features UNC coarse threads (8-32) with right-hand direction and full threading along the 2-1/2" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.