S-94518A520 1/4"-20 x 1" QQ-P-35, MS24671-31 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel and passivated finish, ideal for harsh environments
• High tensile strength of 70,000 psi ensures reliable performance under demanding loads
• Precise Class 3A thread fit provides secure, vibration-resistant fastening in critical assemblies
• Hex drive design with 5/32" drive size allows for easy installation and high torque application
• Standard 82° countersink angle enables flush mounting for streamlined surfaces
• Fully threaded 1/4"-20 UNC coarse spacing offers quick assembly and strong holding power
• Compliance with RoHS 3 and REACH ensures environmental safety and regulatory acceptance

Professional Applications & Engineering Value

These 1/4"-20 UNC flat head screws deliver exceptional engineering value in industrial applications where corrosion resistance and mechanical integrity are paramount. Manufactured from 18-8 stainless steel with a passivated finish, they effectively combat oxidation and chemical exposure in marine, food processing, and outdoor equipment. The hex drive style combined with Class 3A thread fit ensures precise installation without stripping, while the flat head profile with 82° countersink provides aerodynamic and aesthetic benefits in machinery, enclosures, and structural frameworks. Their 70,000 psi tensile strength and full threading support heavy-duty assemblies, reducing maintenance cycles and enhancing operational reliability.

Specification Summary & Compliance

This fastener maintains Class 3A thread fit per UNC standards with coarse spacing, ensuring dimensional accuracy. It conforms to Fed. Spec. QQ-P-35 (MS24671-31) for material and manufacturing consistency. The screw is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing adherence to environmental and safety protocols without hazardous substances.