S-95345A599 1/4"-20 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 corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
- Enhanced vibration resistance through the integrated external-tooth lock washer made from 410 stainless steel, preventing loosening under dynamic loads.
- High tensile strength of 70,000 psi ensures reliable performance in demanding applications without failure.
- Quick and secure installation with fully threaded UNC coarse spacing and Phillips No. 3 drive for efficient assembly.
- Consistent dimensional accuracy with Class 2A thread fit, providing precise engagement and reduced risk of cross-threading.
- Broad regulatory compliance including ASME B18.13 standards, RoHS 3, and REACH, ensuring safety and environmental responsibility.
- Durable rounded pan head design offers a low-profile, smooth finish that resists snagging and improves aesthetics.
Professional Applications & Engineering Value
These rounded head screws with integrated external-tooth lock washers are engineered to address common industrial challenges like vibration-induced loosening and corrosion. The 18-8 stainless steel material combined with a passivated finish provides excellent resistance to rust and chemicals, making them suitable for machinery, automotive assemblies, and outdoor equipment. The UNC coarse thread and fully threaded design allow for rapid installation and strong holding power in materials where quick fastening is critical. By incorporating a lock washer of 410 stainless steel, these screws maintain clamp force under dynamic stresses, reducing maintenance needs and enhancing operational reliability in industrial applications.
Specification Summary & Compliance
This screw features precise Class 2A thread fit and UNC coarse thread spacing for reliable engagement. It adheres to ASME B18.13 manufacturing specifications, ensuring dimensional consistency and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets environmental and safety standards for global industrial use.
