S-90317A723 M3 x 20 mm JIS B 1188-D Stainless Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer
Stainless Steel Pan Head Phillips Screws with Internal-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 internal-tooth lock washer that maintains clamping force in high-motion environments
- Excellent corrosion protection through 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 tolerance and coarse thread spacing for faster assembly
- Secure fastening performance through fully threaded design and Phillips No. 1 drive for consistent torque transfer
- Regulatory compliance assurance meeting JIS B 1188-D standards and environmental regulations including RoHS 3 and REACH
- Optimized head design with pan-style rounded head providing ample bearing surface for distributed load
Professional Applications & Engineering Value
These M3 metric screws with internal-tooth lock washers provide critical vibration-resistant fastening solutions for industrial equipment, automotive components, and electronic enclosures. The 18-8 stainless steel material combined with passivated finish ensures long-term corrosion resistance in harsh environments, while the coarse thread pitch and Class 6g tolerance enable rapid assembly with reliable thread engagement. The integrated lock washer prevents loosening under dynamic loads, making these pan head Phillips screws ideal for applications where maintenance access is limited and fastener integrity is critical. The fully threaded design ensures maximum grip length across the entire 20mm length, providing superior holding power in thin materials and stacked assemblies.
Specification Summary & Compliance
This M3 x 0.5mm pitch x 20mm length screw features Class 6g thread fit with coarse spacing and right-hand threading. Manufacturing conforms to JIS B 1188-D specifications with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The companion internal-tooth lock washer (6.5mm OD, 0.45mm thickness) is manufactured from matching 18-8 stainless steel with identical passivated finish for consistent corrosion protection throughout the fastener assembly.
