S-92245A913 1/4"-20 x 4" FF-S-85, MS35307-322 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
- Exceptional corrosion resistance from passivated 18-8 stainless steel, ensuring long-term reliability in harsh environments.
- High tensile strength of 70,000 PSI provides dependable load-bearing capacity for demanding industrial applications.
- Rockwell B74 hardness offers superior wear resistance and durability under repetitive stress.
- UNC coarse threading with Class 2A fit ensures easy, secure installation and reduced risk of cross-threading.
- Partially threaded design allows for precise clamping force control and vibration resistance in assembled joints.
- External hex head enables quick, high-torque installation with standard tools, improving assembly efficiency.
- Compliance with RoHS 3 and REACH guarantees environmental safety and regulatory acceptance for global supply chains.
Professional Applications & Engineering Value
Engineered for robust performance, these 1/4"-20 x 4" passivated 18-8 stainless steel hex head screws address critical needs in machinery, construction, and marine applications where corrosion and mechanical stress are concerns. The UNC coarse thread and Class 2A thread fit provide reliable engagement in metals and composites, minimizing loosening from vibrations. With a partially threaded shank, the screw concentrates clamping force precisely, preventing joint failure. The passivated surface enhances corrosion resistance without compromising the 70,000 PSI tensile strength, making these screws ideal for structural frames, equipment mounts, and outdoor installations requiring long-term integrity and compliance with Fed. Spec. FF-S-85.
Specification Summary & Compliance
This screw adheres to Class 2A thread fit tolerances and UNC coarse thread standards, ensuring dimensional accuracy. It meets Fed. Spec. FF-S-85 (MS35307-322) for consistent quality and is fully RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, supporting safe and sustainable industrial use.
