S-92245A567 1/4"-28 x 1" FF-S-85, MS35308-308 Mil. Spec. 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ensuring long-term reliability in harsh industrial environments
• Exceptional mechanical strength with 70,000 psi tensile rating and Rockwell B74 hardness for heavy-duty applications requiring high load capacity
• Precise thread engagement through Class 2A UNF fine threading, providing secure fastening with reduced vibration loosening risk
• Optimized installation efficiency with 7/16" external hex head design enabling quick assembly using standard tools
• Enhanced design flexibility through partially threaded shank, allowing for controlled clamping force in specific joint configurations
• Regulatory compliance assurance meeting Fed. Spec. FF-S-85 (MS35308-308), RoHS 3, and REACH standards for global industrial use
• Reliable right-hand thread direction ensuring compatibility with standard assembly procedures and replacement parts

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 1/4"-28 UNF hex head screws deliver critical performance advantages in machinery assembly, structural frameworks, and equipment manufacturing. The passivated 18-8 stainless steel construction provides exceptional resistance to corrosion and chemical exposure, significantly extending service life in challenging environments. The UNF fine thread configuration with Class 2A tolerance ensures precise fitment and superior vibration resistance compared to coarse thread alternatives. With 70,000 psi tensile strength and Rockwell B74 hardness, these fasteners maintain structural integrity under sustained mechanical stress. The partially threaded design allows engineers to control clamping force distribution while the external hex drive facilitates efficient installation in confined spaces using standard wrenches.

Specification Summary & Compliance

This 1/4"-28 UNF hex head screw features precise Class 2A thread fit with right-hand direction and fine thread spacing. Manufacturing complies with Fed. Spec. FF-S-85 (MS35308-308) standards, ensuring dimensional accuracy and performance consistency. The fastener is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting international environmental regulations for industrial components. Critical dimensions include 1" length, 7/16" head width, and 3/4" minimum thread length, manufactured to inch system specifications for North American market applications.