S-91253A352 3/8"-24 x 1/2" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating, extending service life in harsh industrial environments
• Precise Class 3A thread fit ensures superior engagement and vibration resistance in critical assemblies
• High tensile strength (130,000 psi) provides reliable performance under extreme mechanical stress
• Optimized 82° countersink angle delivers flush mounting for streamlined surfaces and improved aerodynamics
• Full threading design maximizes grip length and load distribution across the entire fastener
• Rockwell C39 hardness rating maintains structural integrity against wear and deformation
• 7/32" hex drive compatibility enables secure installation with standard industrial tools

Professional Applications & Engineering Value

These black-oxide alloy steel flat head screws with 3/8"-24 UNF fine threading address critical challenges in precision machinery and structural assemblies. The Class 3A thread fit eliminates backlash in vibration-prone applications, while the 82° countersink creates seamless joints in automotive and aerospace components. Engineered with 130,000 psi tensile strength, they prevent joint failure in high-stress environments like industrial equipment and robotics. The fully threaded design ensures uniform stress distribution, making them ideal for securing critical brackets, panels, and machinery frames where reliability is non-negotiable.

Specification Summary & Compliance

Manufactured to ASTM F835 specifications with precision Class 3A thread tolerances and UNF fine threading. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. Features right-hand thread direction and standard flat head profile for consistent performance across industrial applications.