S-94518A620 5/16"-18 x 1" QQ-P-35, MS24671-41 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
- Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
- High tensile strength of 70,000 psi ensures reliable fastening under heavy loads, reducing the risk of mechanical failure.
- Precise Class 3A thread fit provides superior engagement and vibration resistance in critical assemblies.
- Hex drive design with 3/16" drive size allows for easy installation and high torque application without slippage.
- Standard 82° countersink angle enables flush mounting for a smooth, professional finish in visible applications.
- Full threading and coarse UNC spacing facilitate quick installation and strong holding power in various materials.
- Compliance with Fed. Spec. QQ-P-35 (MS24671-41) guarantees consistent quality and interchangeability in regulated projects.
Professional Applications & Engineering Value
This 5/16"-18 UNC flat head screw is engineered from 18-8 stainless steel with a passivated finish to combat corrosion in demanding settings like marine, chemical processing, and outdoor infrastructure. The Class 3A thread and coarse thread spacing ensure tight, secure fits that resist loosening from vibrations, making it ideal for machinery, automotive, and structural applications. The hex drive design supports efficient assembly with standard tools, while the flat head and 82° countersink angle provide a seamless surface, enhancing safety and aesthetics. With a 70,000 psi tensile strength, it delivers durability where high-stress fastening is critical, reducing maintenance needs and downtime.
Specification Summary & Compliance
This screw adheres to precise dimensional standards, including Class 3A thread fit and UNC coarse threading with a diameter of 0.313". It meets Fed. Spec. QQ-P-35 (MS24671-41) for manufacturing consistency and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability in industrial use.
