S-94518A649 3/8"-16 x 3/4" QQ-P-35, MS24671-51 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
• Superior tensile strength of 70,000 psi ensures reliable performance in demanding, heavy-duty applications.
• Precise Class 3A thread fit guarantees secure, vibration-resistant assemblies and reduces the risk of cross-threading.
• UNC coarse threading provides faster installation and better performance in softer materials or where debris is present.
• 82° countersink angle and flat head design allows for a flush, clean finish when installed, enhancing safety and aesthetics.
• Hex drive (7/32") offers high torque capability and easy installation with common tools, minimizing slippage.
• Full compliance with Fed. Spec. QQ-P-35 (MS24671-51), RoHS 3, and REACH ensures material quality and environmental safety for regulated projects.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this 3/8"-16 UNC flat head screw in 18-8 stainless steel addresses critical needs for durability and reliability. The passivated finish significantly enhances corrosion resistance, making it suitable for machinery, structural assemblies, and outdoor equipment exposed to moisture and chemicals. Its coarse UNC threading and Class 3A fit ensure quick, secure fastening even in high-vibration environments, reducing maintenance and failure risks. The hex drive design allows for efficient torque application, speeding up assembly lines while the 82° countersink provides a smooth, flush mount that prevents snagging and improves operational safety. Ideal for sectors like manufacturing, construction, and transportation where high-strength fasteners are non-negotiable.

Specification Summary & Compliance

This screw features a 3/8"-16 UNC coarse thread with a Class 3A thread fit for precise dimensional accuracy, ensuring consistent performance. It is manufactured in compliance with Fed. Spec. QQ-P-35 (MS24671-51), confirming adherence to strict federal standards for material and threading. Additionally, the product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for hazardous substances. The fully threaded design and specified dimensions (e.g., 3/4" length, 0.781" head diameter) support reliable integration into various assemblies.