S-90585A281 10-32 x 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 and passivated finish, ideal for harsh environments and extended service life.
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under high stress.
• Precise and secure fastening ensured by Class 3A thread fit and UNF fine threading, minimizing the risk of loosening in critical assemblies.
• Flush, low-profile installation with an 82° countersink angle and undercut flat head design for a smooth, aerodynamic surface finish.
• Easy and efficient installation using a standard 1/8" hex drive, allowing for high torque application without slippage.
• Full thread engagement along the 1/4" length provides maximum grip and load distribution in thin materials.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and environmental safety.

Professional Applications & Engineering Value

These 10-32 UNF flat head screws are engineered from 316 stainless steel to solve critical challenges in demanding industrial settings. The material's inherent resistance to chlorides and acids, combined with a passivated finish, prevents corrosion in marine, chemical processing, and food industry applications. The Class 3A thread fit and fine thread spacing deliver superior vibration resistance and precise alignment in machinery, electronics, and aerospace components. The undercut flat head and 82° countersink angle ensure a completely flush mount, eliminating protrusions that could interfere with moving parts or compromise aesthetic requirements in consumer products and precision instruments.

Specification Summary & Compliance

This product features a 10-32 UNF thread with a Class 3A fit for high precision. The head diameter is 0.411" with a tolerance of -0.052" to 0", and the screw is fully threaded over a 1/4" length. Manufacturing and quality adhere to the ASME B18.3 specification. The screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.