S-90317A550 M3 x 4 mm ASME B18.13.1M 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 an integrated external-tooth lock washer that maintains clamp load in high-stress environments.
- Excellent Corrosion Protection thanks to 18-8 stainless steel construction and a passivated finish for long-lasting performance.
- High Tensile Strength & Durability offering 70,000 psi tensile strength and Rockwell B70 hardness for reliable, repeated use.
- Secure & Easy Installation with a Phillips No. 1 drive and coarse M3 x 0.5mm thread for quick assembly and reduced cross-threading risk.
- Precision Fit & Consistency ensured by Class 6g thread fit and full threading for uniform engagement and load distribution.
- Regulatory Compliance & Quality Assurance meeting ASME B18.13.1M standards, RoHS 3, and REACH for safe, global use.
- Enhanced Locking Performance from a 410 stainless steel washer that resists loosening under dynamic loads.
Professional Applications & Engineering Value
This M3 x 0.5mm rounded head screw with an integrated external-tooth lock washer is engineered to address critical challenges in industrial assemblies, such as vibration-induced loosening and corrosion in harsh environments. Made from 18-8 stainless steel with a passivated finish, it provides robust resistance to moisture and chemicals, extending service life in applications like machinery, electronics, and automotive components. The coarse thread and Phillips drive facilitate rapid installation while minimizing thread damage, ensuring consistent performance in high-volume production. By combining a fully threaded design with a secure locking mechanism, this fastener delivers reliable clamping force, reducing maintenance needs and enhancing operational safety in dynamic settings.
Specification Summary & Compliance
This metric screw features a Class 6g thread fit and coarse M3 x 0.5mm threading for precise dimensional accuracy. It complies with ASME B18.13.1M manufacturing specifications and is certified RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring adherence to international safety and environmental standards.
