S-90317A721 M6 x 20 mm ASME B18.13.1M Stainless Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer

Key Features & Benefits at a Glance

• Superior vibration resistance with an integrated 410 stainless steel internal-tooth lock washer that maintains secure fastening in high-motion environments
• Excellent corrosion resistance due to 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh conditions
• High mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for demanding industrial applications
• Reliable thread engagement with fully threaded Class 6g metric coarse threads providing consistent clamping force and easy assembly
• Optimized drive performance featuring Phillips No. 3 drive for efficient installation and reduced cam-out risk
• Secure locking mechanism through the internal-tooth lock washer design that prevents loosening under dynamic loads
• Industry-standard compliance meeting ASME B18.13.1M specifications for dimensional accuracy and performance

Professional Applications & Engineering Value

These M6 pan head screws with integrated lock washers deliver critical engineering solutions for vibration-prone applications. The combination of 18-8 stainless steel material and passivated finish provides exceptional corrosion resistance for outdoor equipment, marine components, and food processing machinery where moisture exposure is common. The internal-tooth lock washer design ensures maintained clamp load in automotive assemblies, industrial machinery, and electrical enclosures subject to constant vibration. With Class 6g thread fit and fully threaded construction, these metric screws offer precise installation in manufacturing equipment, conveyor systems, and structural frameworks where dimensional accuracy is paramount. The Phillips drive facilitates quick assembly in high-volume production environments while the pan head profile provides optimal bearing surface for secure fastening.

Specification Summary & Compliance

This M6 x 1mm pitch x 20mm length screw features Class 6g thread fit with right-hand coarse threading per metric standards. Manufacturing complies with ASME B18.13.1M specifications for dimensional accuracy and performance requirements. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental regulations for hazardous substances. Both the screw body and internal-tooth lock washer feature passivated finish for enhanced corrosion protection.