S-92245A565 1/4"-28 x 3/4" FF-S-85, MS35308-306 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 for extended service life in harsh environments
• High tensile strength of 70,000 psi ensures reliable performance under substantial mechanical loads
• Precision Class 2A thread fit provides consistent engagement and reduces cross-threading risks during assembly
• External hex drive design enables high torque application with standard tools for efficient installation
• Fine UNF thread spacing offers superior vibration resistance and improved clamping force retention
• Full threading along the 3/4" length allows maximum adjustability and secure fastening in various material thicknesses
• Rockwell B74 hardness rating maintains thread integrity and prevents deformation under repeated use

Professional Applications & Engineering Value

These 1/4"-28 UNF hex head screws deliver exceptional engineering value in demanding industrial applications where corrosion resistance and mechanical reliability are critical. The passivated 18-8 stainless steel construction provides superior protection against chemical exposure and environmental factors, making these fully threaded fasteners ideal for marine equipment, food processing machinery, and chemical processing plants. The fine thread spacing combined with Class 2A thread fit ensures vibration-resistant connections in precision assemblies, while the external hex drive facilitates high-torque installation in confined spaces. These screws effectively address common industrial challenges including material degradation, joint loosening, and maintenance frequency, providing long-term operational stability.

Specification Summary & Compliance

Manufactured to exacting standards with Class 2A thread fit tolerance and UNF thread type specifications. Complies with Fed. Spec. FF-S-85 (MS35308-306) manufacturing requirements, ensuring consistent quality and dimensional accuracy. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards, confirming the absence of restricted hazardous substances. The right-hand thread direction and fine thread spacing maintain industry-standard compatibility for replacement and new assembly applications.