S-93085A563 1/4"-28 x 1 1/4" FF-S-92, QQ-P-35, MS24693-C300, NASM24693, SAE AMS2700 Stainless Steel Phillips Flat Head Screws

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 B70 hardness for high-stress applications without failure.
• Precise, secure fastening ensured by Class 2A thread fit and fine UNF threading, reducing the risk of loosening under vibration.
• Efficient installation and flush finish with a standard flat head profile, 100° countersink angle, and Phillips No. 3 drive for easy, countersunk seating.
• Full thread engagement along the 1-1/4" length provides maximum grip and load distribution in assembled components.
• Broad regulatory compliance including RoHS 3 and REACH, ensuring environmental safety and meeting global industry standards.
• Reliable performance in critical systems backed by adherence to Fed. Spec. FF-S-92, QQ-P-35, MS24693-C300, NASM24693, and SAE AMS2700.

Professional Applications & Engineering Value

This 1/4"-28 UNF flat head screw is engineered to address common industrial challenges such as vibration-induced loosening, corrosion in demanding environments, and the need for reliable, high-strength fastening. The passivated 18-8 stainless steel material provides excellent resistance to oxidation and chemical exposure, making it suitable for applications in aerospace, marine, and manufacturing equipment where durability is critical. The fine thread spacing and Class 2A thread fit ensure tight, precise connections that maintain integrity under dynamic loads. With a Phillips No. 3 drive and 100° countersink angle, it allows for quick, flush installations in pre-drilled holes, reducing assembly time and improving aesthetic finishes. Ideal for use in machinery, electronic enclosures, and structural assemblies, this screw delivers consistent performance where high tensile strength and regulatory compliance are paramount.

Specification Summary & Compliance

This product features precise Class 2A thread fit and adheres to UNF thread standards with fine spacing for accurate engagement. It meets multiple industry specifications including Fed. Spec. FF-S-92, QQ-P-35, MS24693-C300, NASM24693, and SAE AMS2700, ensuring consistent quality and performance. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental and safety standards in global supply chains.