S-92245A962 1/2"-20 x 2 1/4" FF-S-85, MS35308-416 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 environments and long-term reliability.
- Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B74 hardness for demanding applications.
- Precise thread engagement with Class 2A thread fit and UNF fine threading, ensuring secure fastening and vibration resistance.
- Optimized load distribution through the partially threaded design, reducing stress concentration in critical assemblies.
- Easy installation and removal with a standard 3/4" external hex head, compatible with common wrenches for efficient maintenance.
- Compliance with stringent standards including Fed. Spec. FF-S-85 (MS35308-416), guaranteeing consistent quality and interchangeability.
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements.
Professional Applications & Engineering Value
This 1/2"-20 UNF hex head screw is engineered to address critical challenges in industrial settings, such as corrosion-induced failure and mechanical stress. The passivated 18-8 stainless steel provides excellent resistance to moisture and chemicals, extending service life in marine, chemical processing, and outdoor equipment. Its partially threaded configuration minimizes thread galling and distributes clamping force effectively, preventing joint loosening under vibration. With a fine UNF thread and Class 2A fit, it ensures precise alignment in machinery, automotive, and structural assemblies, reducing downtime and maintenance costs. Ideal for heavy-duty fastening, this screw delivers reliable performance where high tensile strength and durability are paramount.
Specification Summary & Compliance
The screw adheres to Class 2A thread fit tolerances and UNF (Unified National Fine) thread standards, ensuring dimensional accuracy. It meets Fed. Spec. FF-S-85 (identified as MS35308-416) for material and manufacturing consistency. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) confirms its environmental safety, free from hazardous substances, making it suitable for global supply chains and sustainable engineering projects.
