S-92245A544 1/4"-20 x 1 1/4" FF-S-85, MS35307-310 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
- High tensile strength of 70,000 PSI ensures reliable performance under heavy loads and vibration
- Class 2A thread fit provides consistent, easy assembly while maintaining secure fastening
- External hex drive design allows for high torque application with standard tools
- Partially threaded shank offers optimal grip length for precise clamping force distribution
- Full regulatory compliance with RoHS 3 and REACH standards for global industrial applications
- Coarse UNC threading enables quick installation and superior resistance to vibration loosening
Professional Applications & Engineering Value
This 1/4-20 UNC hex head screw delivers exceptional engineering value through its passivated 18-8 stainless steel composition, providing critical corrosion resistance in demanding applications including marine equipment, food processing machinery, and outdoor structural assemblies. The partially threaded design combined with Class 2A thread fit ensures precise clamping force distribution while preventing material damage during installation. With 70,000 PSI tensile strength and Rockwell B74 hardness, this fastener maintains structural integrity under continuous stress and vibration, making it ideal for machinery, conveyor systems, and heavy equipment where reliability is paramount. The external hex drive facilitates high-torque installation in confined spaces, streamlining assembly processes across manufacturing and maintenance operations.
Specification Summary & Compliance
This 1/4-20 UNC hex head screw features precise Class 2A thread fit per UNC standards with coarse threading for optimal engagement. Manufacturing complies with Fed. Spec. FF-S-85 (MS35307-310) ensuring consistent quality and dimensional accuracy. The fastener is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting international environmental and safety standards for industrial components.
