S-95345A021 4-40 x 3/16" 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 corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
- Reliable vibration resistance through the integrated 410 stainless steel internal-tooth lock washer, preventing loosening under dynamic loads.
- High tensile strength of 70,000 psi ensures dependable performance in demanding mechanical applications.
- Effortless installation with No. 1 Phillips drive and fully threaded coarse UNC design for quick, secure fastening.
- Precise thread fit (Class 2A) guarantees consistent engagement and reduces the risk of cross-threading.
- Compliance with ASME B18.13 and environmental standards (RoHS 3, REACH) for assured quality and regulatory acceptance.
- Versatile rounded pan head profile provides a low-profile, flush finish suitable for various assembly designs.
Professional Applications & Engineering Value
Engineered for industrial applications where vibration resistance and corrosion prevention are critical, this 4-40 UNC coarse thread screw combines 18-8 stainless steel with a passivated finish to withstand corrosive environments. The integrated internal-tooth lock washer, made from 410 stainless steel, bites into surfaces to maintain clamp load, solving common loosening issues in machinery, electronics, and automotive assemblies. Its fully threaded design and Class 2A thread fit ensure uniform stress distribution and easy alignment, reducing installation time and enhancing joint integrity. Ideal for securing components in enclosures, panels, and equipment subjected to dynamic stresses, this fastener delivers long-term reliability and compliance with industry specifications.
Specification Summary & Compliance
This screw features a 4-40 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy. It is manufactured in accordance with ASME B18.13 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability.
