S-93085A558 1/4"-28 x 5/8" FF-S-92, QQ-P-35, MS24693-C295, NASM24693, SAE AMS2700 Stainless Steel Phillips Flat Head Screws
Stainless Steel Phillips Flat 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 high-stress applications
- Precise Class 2A thread fit provides smooth installation and secure fastening in fine-threaded assemblies
- Optimized 100° countersink angle allows for flush mounting and reduced protrusion in finished surfaces
- Full threading along the 5/8" length maximizes grip and load distribution across the entire fastener
- Consistent Rockwell B70 hardness maintains dimensional stability and resistance to wear over time
- Broad regulatory compliance including RoHS 3 and REACH ensures environmental and safety standards are met
Professional Applications & Engineering Value
This 1/4"-28 UNF flat head screw delivers critical engineering advantages in demanding applications where material integrity and precision matter most. The passivated 18-8 stainless steel provides excellent resistance to oxidation and chemical exposure, making it suitable for aerospace, automotive, and marine assemblies. The fine UNF thread and Class 2A fit ensure vibration resistance and prevent loosening in dynamic environments. With its Phillips No. 3 drive and standard flat head profile, installation is streamlined while maintaining a low-profile finish. These screws are engineered to meet rigorous specifications like Fed. Spec. FF-S-92 and MS24693-C295, providing reliability in structural and machinery fastening where failure is not an option.
Specification Summary & Compliance
This fastener features a 1/4"-28 UNF fine thread with Class 2A tolerance for precise fit. It is manufactured in compliance with Fed. Spec. FF-S-92, QQ-P-35, MS24693-C295, and NASM24693. The screw is fully threaded, measures 5/8" in length, and includes a 100° countersink angle. It conforms to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of restricted substances and safe for industrial use.
