S-90317A100 M2.5 x 4 mm ASME B18.13.1M 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-stress environments
- Exceptional corrosion resistance through 18-8 stainless steel construction and passivated surface treatment
- Optimized thread engagement with Class 6g tolerance coarse threads ensuring reliable fastening in various materials
- High mechanical strength delivering 70,000 psi tensile strength and Rockwell B70 hardness for demanding applications
- Industry-standard compatibility meeting ASME B18.13.1M specifications for consistent performance
- Enhanced installation efficiency with Phillips No. 1 drive and pan head design for secure tool engagement
- Environmental compliance assurance with RoHS 3 and REACH regulations for global market acceptance
Professional Applications & Engineering Value
This M2.5 machine screw with internal-tooth lock washer addresses critical vibration-induced loosening in industrial equipment, electronic enclosures, and precision machinery. The 18-8 stainless steel core provides excellent corrosion resistance in harsh environments, while the passivated finish enhances surface durability. The coarse thread (0.45 mm pitch) with Class 6g tolerance ensures reliable installation in various substrates without cross-threading risks. The combination of 70,000 psi tensile strength and Rockwell B70 hardness makes these pan head Phillips screws ideal for applications requiring repeated disassembly and reassembly without performance degradation.
Specification Summary & Compliance
Manufactured to ASME B18.13.1M standards with Class 6g thread fit tolerance for precision fastening. The metric screw features M2.5 diameter, 0.45 mm pitch coarse threading, and 4 mm length with full threading. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The lock washer component utilizes 410 stainless steel with matching passivated finish for consistent corrosion protection throughout the assembly.
