S-91253A148 6-32 x 1/2" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating, extending service life in demanding industrial environments.
• Exceptional mechanical strength with 130,000 psi tensile strength and Rockwell C39 hardness for reliable performance under high stress.
• Precision thread fit with Class 3A tolerance ensuring secure, vibration-resistant connections in critical assemblies.
• Efficient installation via 5/64" hex drive, providing positive torque control and reducing tool slippage.
• Optimal flush seating with 82° countersink angle and standard flat head profile for a smooth, unobtrusive finish.
• Broad compatibility with UNC coarse threads and right-hand direction, suitable for standard industrial components.
• Full regulatory compliance meeting ASME B18.3, ASTM F835, RoHS 3, and REACH for safe, quality-assured usage.

Professional Applications & Engineering Value

These 6-32 UNC flat head screws in black-oxide alloy steel are engineered to address common industrial challenges such as joint failure and corrosion. The fully threaded design with coarse thread spacing ensures maximum grip in soft materials or pre-tapped holes, while the hex drive allows for high-torque installation without cam-out. Ideal for machinery, electronics, and automotive assemblies, they provide a flush-mounted solution that maintains structural integrity and resists environmental degradation, reducing maintenance cycles and enhancing operational reliability.

Specification Summary & Compliance

This product adheres to Class 3A thread fit per UNC standards, ensuring precise dimensional accuracy. Manufacturing complies with ASME B18.3 and ASTM F835 specifications, with full conformance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, guaranteeing safety and sustainability in industrial applications.