S-90317A175 M4 x 16 mm JIS B 1188-D Stainless Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer

Key Features & Benefits at a Glance

• Superior vibration resistance with integrated internal-tooth lock washer that maintains secure fastening in high-motion environments
• Excellent corrosion resistance thanks to 18-8 stainless steel construction and passivated surface treatment
• High mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for demanding applications
• Reliable thread engagement with Class 6g thread fit and coarse pitch for quick assembly and reduced cross-threading risk
• Optimized drive performance featuring Phillips No. 2 drive for efficient torque transfer and reduced cam-out
• Complete regulatory compliance meeting JIS B 1188-D standards, RoHS 3, and REACH for global industrial use
• All-in-one assembly solution combining screw and lock washer in a single component to simplify inventory and installation

Professional Applications & Engineering Value

These M4 metric screws with internal-tooth lock washers provide critical vibration-resistant fastening for industrial equipment, automotive components, and machinery assemblies. The 18-8 stainless steel construction ensures reliable performance in corrosive environments, while the passivated finish enhances surface durability. The fully threaded design with Class 6g thread fit guarantees consistent clamping force across the entire fastener length, preventing loosening under dynamic loads. The integrated internal-tooth lock washer bites into both the mounting surface and screw head, creating a permanent locking action that eliminates the need for additional anti-vibration components. This engineered solution addresses common failure points in vibrating systems while maintaining JIS B 1188-D compliance for quality assurance in precision manufacturing applications.

Specification Summary & Compliance

This M4 x 0.7mm pitch x 16mm length fastener features Class 6g thread tolerance with coarse thread spacing and right-hand threading. Manufactured to JIS B 1188-D specifications with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations. The pan head design with Phillips No. 2 drive and integrated internal-tooth lock washer (8.5mm OD, 0.6mm thickness) provides a complete vibration-resistant fastening system suitable for industrial and commercial applications requiring reliable performance under demanding conditions.