S-90585A235 8-32 x 1 1/4" ASME B18.3, ASTM F879 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction and passivated finish, ideal for harsh environments and extended service life
• High mechanical strength and durability offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under heavy loads
• Precise Class 3A thread fit ensures secure, vibration-resistant connections with minimal risk of loosening in critical assemblies
• Efficient hex drive design (3/32") provides excellent torque transmission and easy installation with standard tools, reducing assembly time
• Full threading along the 1-1/4" length allows for maximum grip and adjustability in a wide range of material thicknesses
• Standard 82° countersink angle enables a flush, professional finish that minimizes protrusion and improves aerodynamic or aesthetic surfaces
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety, quality, and environmental responsibility

Professional Applications & Engineering Value

Engineered for demanding industrial and marine settings, these 8-32 UNC flat head screws in 316 Stainless Steel address critical challenges like corrosion, high stress, and regulatory compliance. The passivated finish enhances surface durability, preventing oxidation in salty or chemically aggressive environments. With a coarse UNC thread and Class 3A fit, they provide superior holding power in metals, plastics, and composites, reducing the risk of thread stripping. The hex drive and fully threaded design streamline installation in tight spaces, making them ideal for machinery, enclosures, and structural frameworks where reliability and ease of maintenance are paramount.

Specification Summary & Compliance

This screw features precise dimensional tolerances, including a head diameter of 0.359" and Class 3A thread fit per UNC standards, ensuring consistent performance. It is manufactured in accordance with ASME B18.3 and ASTM F879 specifications, guaranteeing mechanical integrity. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for global industrial use.