S-90273A587 5/16"-18 x 1 1/2" ASME B18.6.3 Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with zinc plating for extended service life in industrial environments
• Superior holding power from fully threaded UNC coarse threads ensuring reliable fastening in various materials
• High tensile strength of 60,000 psi provides dependable performance under heavy loads and stress
• Rockwell B70 hardness offers excellent durability and resistance to wear during installation and use
• Precise Class 2A thread fit allows for easy assembly while maintaining secure connections
• Standard 82° countersink angle enables flush mounting for a clean, professional finish
• Phillips drive compatibility ensures straightforward installation with common tools

Professional Applications & Engineering Value

These zinc-plated steel flat head screws with 5/16"-18 UNC coarse threading deliver exceptional performance in demanding industrial settings. The combination of 60,000 psi tensile strength and Rockwell B70 hardness ensures reliable fastening in machinery, equipment assembly, and structural applications where vibration resistance is critical. The fully threaded design provides maximum grip length, while the standard 82° countersink creates seamless surface finishes. Ideal for automotive, manufacturing, and construction industries, these Phillips drive screws offer quick installation and removal without compromising on corrosion resistance or mechanical integrity.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 specifications with Class 2A thread fit for consistent dimensional accuracy. Features UNC coarse threads with right-hand direction and standard flat head profile. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial applications.