S-90283A548 1/4"-20 x 1 3/4" ASME B18.6.3 Steel Pan Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh industrial environments
• High tensile strength of 60,000 psi ensures reliable performance under substantial mechanical loads
• Class 2A thread fit provides optimal balance between easy assembly and secure fastening retention
• Slotted pan head design offers convenient installation with standard screwdrivers while maintaining a low-profile appearance
• UNC coarse threading enables quick installation and reduced cross-threading risks in production environments
• Full threading along 1-3/4" length allows for maximum adjustability and grip depth in various material thicknesses
• Rockwell B60 hardness maintains thread integrity and prevents stripping during repeated installations

Professional Applications & Engineering Value

This zinc-plated steel slotted pan head screw addresses critical industrial fastening challenges where corrosion resistance and mechanical reliability are paramount. The combination of UNC coarse thread design and Class 2A fit significantly reduces installation time while preventing cross-threading in high-volume assembly operations. The rounded pan head profile distributes clamping force evenly, minimizing surface damage while the zinc plating provides essential protection against oxidation in manufacturing facilities, outdoor equipment, and electrical enclosures. With 60,000 psi tensile strength, these fully threaded screws deliver consistent performance in machinery, structural frameworks, and heavy-duty applications where vibration resistance and long-term fastener integrity are essential engineering requirements.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit tolerances ensuring precise dimensional accuracy. The 1/4"-20 UNC coarse thread maintains standard compatibility across industrial applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations guarantees safe usage in regulated industries. All dimensional specifications including 0.492" head diameter and 1-3/4" length adhere to standardized measurement protocols for consistent performance and interchangeability.