S-91253A465 10-24 x 4" ASME B18.3 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide finish for extended service life in demanding environments
• Exceptional tensile strength of 130,000 psi ensures reliable performance under heavy loads
• Precise Class 3A thread fit provides secure, vibration-resistant fastening in critical applications
• Hex drive convenience allows for high-torque installation with standard tools
• Partially threaded design enables optimal clamping force distribution across joined materials
• 82° countersink angle ensures flush mounting for clean, professional finishes
• Industry compliance meets ASME B18.3 and ASTM F835 specifications for guaranteed quality

Professional Applications & Engineering Value

Engineered for industrial applications requiring robust fastening solutions, these 10-24 UNC flat head screws combine black-oxide alloy steel construction with Rockwell C39 hardness to withstand extreme mechanical stress and prevent stripping. The coarse thread design facilitates quick assembly in softer materials while maintaining grip strength. The hex drive configuration provides superior torque transfer compared to slotted heads, reducing installation time and tool slippage in high-volume production environments. These partially threaded screws are ideal for machinery assembly, structural frameworks, and equipment manufacturing where vibration resistance and long-term reliability are critical.

Specification Summary & Compliance

Manufactured to exacting Class 3A thread fit tolerances with UNC coarse threading (10-24 size) and 4" length. Complies with ASME B18.3 dimensional standards and ASTM F835 material specifications. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance for safe use across global markets.