S-94518A108 4-40 x 3/8" QQ-P-35, MS24671-2 Stainless Steel Hex Drive Flat Head Screws
Stainless Steel Hex Drive 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 thanks to 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments.
- High tensile strength of 70,000 psi provides dependable fastening under significant mechanical stress and vibration.
- Precision Class 3A thread fit guarantees secure, tight engagement and reduces the risk of cross-threading during installation.
- 82° countersink angle and flat head design enable a flush, unobtrusive finish for streamlined assemblies and improved aesthetics.
- Fully threaded coarse UNC pattern offers quick installation and strong holding power in a variety of materials.
- 1/16" hex drive allows for easy, slip-resistant tightening with standard tools, speeding up assembly processes.
- Compliance with RoHS 3 and REACH ensures environmental safety and meets stringent international regulatory standards.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these 4-40 UNC flat head screws in 18-8 stainless steel address common challenges like corrosion, vibration loosening, and assembly efficiency. The passivated finish significantly enhances surface durability, making them ideal for applications in electronics, machinery, and outdoor equipment where moisture or chemicals are present. The coarse thread and Class 3A fit ensure rapid, reliable fastening in metals and plastics, reducing installation time while maintaining high tensile strength. Their flat head with 82° countersink provides a smooth, low-profile finish, essential for aerodynamic or safety-critical components. Trusted in aerospace, automotive, and general manufacturing, these screws deliver consistent performance and longevity.
Specification Summary & Compliance
This product adheres to precise dimensional standards, including Class 3A thread fit and UNC coarse threading for optimal engagement. It meets Fed. Spec. QQ-P-35 (MS24671-2) for material and manufacturing consistency. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), it ensures environmental and health safety in industrial applications.
