S-91253A238 10-24 x 1/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating that protects against rust in demanding industrial environments
• Exceptional mechanical strength with 130,000 psi tensile rating and Rockwell C39 hardness for heavy-duty applications
• Precise Class 3A thread fit ensures secure fastening with minimal play in critical assemblies
• Optimized drive efficiency with hex drive design providing maximum torque transfer and reduced cam-out
• Enhanced flush mounting with 82° countersink angle for seamless surface integration
• Reliable coarse threading (UNC) enables quick installation and superior vibration resistance
• Full environmental compliance meeting RoHS 3 and REACH standards for global manufacturing requirements

Professional Applications & Engineering Value

These 10-24 UNC flat head screws deliver critical performance advantages for industrial assembly applications where vibration resistance and flush surface mounting are paramount. The black-oxide alloy steel construction provides superior protection against corrosion while maintaining the 130,000 psi tensile strength needed for structural applications. The coarse UNC threading combined with Class 3A fit ensures rapid installation with exceptional holding power in materials where fine threads might strip. The hex drive configuration allows for high-torque applications without slippage, making these flat head screws ideal for machinery, equipment manufacturing, and automotive assemblies requiring reliable, recessed fastening solutions.

Specification Summary & Compliance

Manufactured to ASTM F835 specifications with Class 3A thread fit precision and UNC coarse threading. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. Features include 82° countersink angle, right-hand threading, and fully threaded design with dimensional accuracy maintained throughout production.