S-92245A945 5/16"-24 x 1 3/8" FF-S-85, MS35308-337 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 from 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
- Rockwell B74 hardness provides excellent durability and resistance to wear over extended use
- Class 2A thread fit guarantees precise, secure fastening with consistent engagement
- Partially threaded design allows for controlled clamping force and reduced thread galling
- External hex drive enables easy installation and removal with standard tools
- Full compliance with RoHS 3 and REACH ensures environmental safety and regulatory acceptance
Professional Applications & Engineering Value
This 5/16"-24 UNF hex head screw delivers critical performance in demanding applications where corrosion resistance and mechanical reliability are paramount. The passivated 18-8 stainless steel material provides excellent protection against oxidation and chemical exposure, making it suitable for marine, chemical processing, and outdoor equipment. The UNF fine thread design offers superior vibration resistance compared to coarse threads, while the partially threaded shank concentrates clamping force precisely where needed. With its 70,000 psi tensile strength and Rockwell B74 hardness, this fastener maintains integrity in high-load assemblies, from machinery frames to structural components, ensuring long-term operational safety and reduced maintenance requirements.
Specification Summary & Compliance
Manufactured to exacting standards including Class 2A thread fit for consistent dimensional accuracy and proper mating with UNF nuts. Complies with Fed. Spec. FF-S-85 (MS35308-337) for quality assurance in government and industrial applications. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming absence of restricted hazardous substances. Thread specifications include 5/16"-24 UNF right-hand fine thread with minimum thread length of 7/8" on a 1 3/8" overall length body.
