S-91253A486 1-64 x 1/8" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating, ideal for harsh industrial environments
• Superior tensile strength of 130,000 psi ensures reliable performance under high-stress applications
• Precise Class 3A thread fit guarantees secure, vibration-resistant connections in critical assemblies
• Hex drive design (0.050") provides superior torque transmission and reduces stripping risks
• Undercut flat head with 82° countersink enables flush mounting for streamlined surfaces
• Full threading and coarse UNC pattern delivers faster installation and enhanced grip in various materials
• Hardened alloy steel construction (Rockwell C39) maintains structural integrity under repeated use

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 1-64 UNC flat head screws combine black-oxide alloy steel with a fully threaded coarse UNC pattern to address common fastening challenges. The undercut flat head profile and 82° countersink angle ensure seamless flush mounting in precision equipment, while the hex drive system prevents cam-out during high-torque assembly. With Class 3A thread fit and 130,000 psi tensile strength, these screws provide vibration-resistant, high-strength fastening solutions for machinery, automotive components, and electronic enclosures where reliability is critical.

Specification Summary & Compliance

Manufactured to ASME B18.3 and ASTM F835 specifications with Class 3A thread fit and inch system dimensions. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features include right-hand UNC coarse threads, Rockwell C39 hardness, and precise 82° countersink geometry for standardized industrial applications.