S-90317A109 M2.5 x 12 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 corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
- Reliable vibration-proof locking through the integrated internal-tooth lock washer made from 410 stainless steel
- High-strength performance with 70,000 PSI tensile strength and Rockwell B70 hardness for demanding applications
- Easy installation and removal with Phillips No. 1 drive and standard pan head design
- Precise metric threading with Class 6g fit and coarse 0.45mm pitch ensuring secure fastening in various materials
- Full thread engagement along the 12mm length for maximum grip and load distribution
- Regulatory compliance assurance meeting ASME B18.13.1M, RoHS 3, and REACH standards
Professional Applications & Engineering Value
These M2.5 metric screws with rounded pan head and internal-tooth lock washer address critical industrial challenges where vibration loosening and corrosion compromise assembly integrity. The 18-8 stainless steel base material combined with passivated finish provides exceptional resistance to oxidation and chemical exposure, making them suitable for electronics enclosures, machinery panels, and outdoor equipment. The coarse thread with Class 6g tolerance ensures quick installation in soft metals and plastics while maintaining holding power. The 410 stainless steel lock washer actively prevents back-off under dynamic loads, eliminating maintenance downtime in automotive, aerospace, and industrial control systems where reliable vibration-resistant fastening is paramount.
Specification Summary & Compliance
This fully threaded metric screw features M2.5 diameter with 0.45mm pitch coarse threading manufactured to Class 6g tolerance. The assembly complies with ASME B18.13.1M mechanical specifications and demonstrates conformity with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Components include a 5mm diameter pan head with Phillips No. 1 drive and integrated internal-tooth lock washer (5.59mm OD, 0.38mm thickness), all featuring passivated surface treatment for enhanced durability.
