S-95345A432 4-40 x 3/8" ASME B18.13 Stainless Steel Pan Head Phillips Screws with External-Tooth Lock Washer
Stainless Steel Pan Head Phillips Screws with External-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 integrated external-tooth lock washer for reliable performance in high-motion environments
- Excellent corrosion resistance through 18-8 stainless steel construction and passivated finish for extended service life
- High tensile strength of 70,000 psi ensures dependable fastening in demanding industrial applications
- Precise Class 2A thread fit provides consistent engagement and reliable assembly performance
- Coarse UNC threading enables quick installation and reduced cross-threading risk
- Fully threaded design offers maximum holding power along the entire screw length
- Industry-standard compliance with ASME B18.13 specifications for guaranteed quality and interchangeability
Professional Applications & Engineering Value
These 4-40 UNC rounded head Phillips screws with external-tooth lock washers are engineered to solve critical vibration-induced loosening problems in industrial equipment and machinery. The combination of 18-8 stainless steel material and passivated finish provides exceptional corrosion resistance, making them ideal for harsh environments including marine applications, food processing equipment, and outdoor machinery. The pan head design with Phillips drive offers excellent torque transmission while the 410 stainless steel lock washer maintains clamping force under dynamic loads. These fully threaded screws deliver reliable performance in electronic enclosures, automotive components, and precision instruments where vibration resistance and corrosion protection are paramount.
Specification Summary & Compliance
This fastener features Class 2A thread fit with UNC coarse threading and right-hand thread direction, manufactured to precise dimensional standards. The assembly meets ASME B18.13 specifications for consistent quality and performance. Environmental compliance includes RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, ensuring these components meet current environmental regulations for industrial use worldwide.
