S-92245A548 1/4"-20 x 1 3/4" FF-S-85, MS35307-313 Mil. Spec. 18-8 Stainless Steel Hex Head Screws
Mil. Spec. 18-8 Stainless Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
- Exceptional tensile strength of 70,000 PSI ensures reliable performance under high-stress applications
- Easy installation and removal with standard external hex drive and UNC coarse threading
- Precise thread fit with Class 2A tolerance for consistent engagement and reduced cross-threading risks
- Optimized load distribution through partial threading design, enhancing joint integrity
- Long-term durability supported by Rockwell B74 hardness, resisting wear and deformation
- Regulatory compliance with RoHS 3 and REACH, ensuring safe and environmentally responsible use
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 1/4"-20 UNC hex head screws provide critical reliability in machinery, structural assemblies, and heavy equipment. The passivated 18-8 stainless steel offers excellent resistance to oxidation and chemical exposure, reducing maintenance in corrosive settings. With a coarse thread and Class 2A fit, installation is swift and secure, minimizing assembly errors. The partial threading concentrates clamping force where needed, preventing joint loosening under vibration. Ideal for OEM and MRO uses, these screws deliver consistent performance in construction, automotive, and marine industries where corrosion-resistant fasteners are essential for long-term operational safety.
Specification Summary & Compliance
This hex head screw features a 1/4"-20 UNC coarse thread with Class 2A dimensional accuracy, ensuring compatibility with standard nuts and tapped holes. Manufacturing adheres to Fed. Spec. FF-S-85 (MS35307-313), guaranteeing consistent quality. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances for safe industrial use.
