S-92245A958 1/2"-20 x 3/4" FF-S-85, MS35308-407 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 heavy loads and vibration
- Precise Class 2A thread fit provides smooth assembly and secure fastening with minimal risk of cross-threading
- External hex drive design allows for high-torque installation using standard tools, reducing installation time
- Fine UNF thread spacing delivers superior holding power and resistance to loosening in dynamic applications
- Full threading along the 3/4" length maximizes grip range and versatility across various material thicknesses
- Compliance with Fed. Spec. FF-S-85 (MS35308-407) guarantees consistent quality and interchangeability
Professional Applications & Engineering Value
This 1/2"-20 UNF hex head screw is engineered to address critical fastening challenges in demanding industrial settings. The passivated 18-8 stainless steel provides excellent resistance to oxidation and chemical exposure, making it suitable for outdoor, marine, and chemical processing applications where durability is paramount. The fine thread spacing and Class 2A fit ensure tight, secure connections that resist vibration-induced loosening in machinery, automotive assemblies, and structural frameworks. With a Rockwell B74 hardness and 70,000 PSI tensile strength, it maintains integrity under high stress, reducing the risk of fastener failure. The external hex drive facilitates quick installation and removal with common tools, enhancing maintenance efficiency in heavy-duty fastening scenarios.
Specification Summary & Compliance
This screw features a 1/2"-20 UNF thread with Class 2A tolerance for precise fit, fully threaded along a 3/4" length. It conforms to Fed. Spec. FF-S-85 (MS35308-407) and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability.
