S-95092A320 4-40 x 5/16" ASME B18.13 Stainless Steel Pan Head Phillips Screws with Flat and Split Lock Washer
Stainless Steel Pan Head Phillips Screws with Flat and Split 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 stainless steel lock washer to prevent loosening in dynamic applications
- Exceptional corrosion protection through 18-8 stainless steel construction and passivated surface treatment
- High-strength performance delivering 70,000 psi tensile strength for demanding mechanical applications
- Quick installation with Phillips #1 drive and coarse UNC threads that reduce assembly time
- Reliable thread engagement through Class 2A fit and full threading along the entire 5/16" length
- Enhanced load distribution from the pan head design and integrated flat washer (0.375" OD)
- Industry compliance meeting ASME B18.13 specifications for consistent quality and performance
Professional Applications & Engineering Value
These 4-40 UNC rounded head Phillips screws with integrated lock washers solve critical fastening challenges in industrial environments where vibration and corrosion compromise joint integrity. The 18-8 stainless steel construction combined with passivated finish provides exceptional resistance to rust and chemical exposure, making them ideal for machinery, electrical enclosures, and outdoor equipment. The coarse thread design ensures rapid installation in various materials while maintaining 70,000 psi tensile strength. The combination of Phillips drive and pre-assembled washers eliminates the need for separate components, streamlining assembly processes in manufacturing and maintenance applications where reliability is paramount.
Specification Summary & Compliance
This rounded head screw features 4-40 UNC coarse threads with Class 2A fit tolerance and full threading along its 5/16" length (-0.02" to 0" length tolerance). Manufactured to ASME B18.13 specifications, these fasteners are RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental responsibility and regulatory adherence for global industrial applications.
