S-95345A029 4-40 x 7/16" ASME B18.13 Stainless Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer
Stainless Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Washer & Nut
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior vibration resistance with an integrated internal-tooth lock washer that maintains clamp force in high-stress environments.
- Excellent corrosion resistance due to 18-8 Stainless Steel construction and a passivated finish, ideal for harsh industrial settings.
- High tensile strength of 70,000 psi ensures reliable performance and durability under heavy loads.
- Secure and efficient installation with a Phillips #1 drive and standard pan head for easy torque application.
- Precise thread fit (Class 2A) and coarse UNC threading for quick assembly and reduced cross-threading risks.
- Full threading along the 7/16" length provides consistent engagement and holding power in various materials.
- Compliance with industry standards including ASME B18.13, ensuring quality and reliability for professional use.
Professional Applications & Engineering Value
This 4-40 UNC rounded head Phillips screw with an internal-tooth lock washer is engineered to address common industrial challenges like loosening under vibration and corrosion in demanding environments. Made from 18-8 Stainless Steel with a passivated finish, it resists rust and chemical exposure, making it ideal for machinery, electronics, and automotive assemblies. The coarse UNC thread and Class 2A fit enable rapid installation with minimal effort, while the lock washer design prevents back-off, reducing maintenance needs. Its 70,000 psi tensile strength supports heavy-duty applications, ensuring long-term reliability in sectors requiring vibration-resistant fasteners and compliance with strict regulatory standards.
Specification Summary & Compliance
This screw features a 4-40 UNC coarse thread with Class 2A fit for precise dimensional accuracy, and is fully threaded for consistent performance. It meets ASME B18.13 specifications for screw manufacturing, ensuring adherence to industry norms. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming it is free from hazardous substances and suitable for global industrial use.
