S-90401A144 6-32 x 1/4" Hex Head Screws with Lock Washer
Hex Head Screws with 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 external-tooth lock washer that maintains clamping force in high-stress applications
- Enhanced corrosion protection through zinc-plated steel construction for extended service life in harsh environments
- High tensile strength rating of 60,000 psi ensures reliable performance under heavy mechanical loads
- Quick installation and removal with external hex drive design that provides excellent torque transmission
- Optimized thread engagement through UNC coarse threading and Class 2A fit for faster assembly in various materials
- Consistent hardness performance with Rockwell B70 rating that prevents stripping and deformation
- Full threading coverage along the 1/4" length for maximum grip and holding power
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these zinc-plated steel hex head screws with external-tooth lock washers provide critical vibration resistance in machinery, automotive assemblies, and electrical enclosures. The UNC coarse thread pattern ensures rapid installation in steel, aluminum, and plastic components while maintaining Class 2A thread fit precision. The combination of 60,000 psi tensile strength and Rockwell B70 hardness addresses common failure points in high-vibration applications, preventing loosening and maintaining joint integrity. The zinc plating offers essential corrosion protection, making these fully threaded screws ideal for outdoor equipment, manufacturing fixtures, and maintenance applications where reliability is paramount.
Specification Summary & Compliance
This 6-32 x 1/4" hex head screw features UNC coarse threads with Class 2A fit tolerance and right-hand thread direction. Manufactured from zinc-plated steel with integrated external-tooth lock washer (0.285" OD, 0.022" thickness). Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across regulated industries and international markets.
