S-90343A113 4-40 x 1/2" ASME B18.3 18-8 Stainless Steel Thread-Locking Socket Head Screws
18-8 Stainless Steel Thread-Locking Socket Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Permanent vibration resistance with epoxy thread locker that eliminates loosening in high-stress environments
- Superior corrosion resistance from 18-8 stainless steel construction for long-term reliability in harsh conditions
- High-strength performance with 70,000 psi tensile strength and Rockwell B70 hardness for demanding applications
- Precise thread engagement with Class 3A fit ensuring secure fastening and reduced assembly issues
- Wide temperature tolerance from -60° to 300°F maintaining locking integrity across extreme operating conditions
- Optimized drive efficiency with hex socket design and 3/32" drive size for secure tool engagement
- Industry compliance assurance meeting ASME B18.3 specifications for reliable quality standards
Professional Applications & Engineering Value
Engineered for critical industrial fastening applications where vibration resistance and permanent locking are essential, these socket head cap screws with epoxy thread locker provide reliable solutions for machinery, automotive, and aerospace components. The 18-8 stainless steel material offers excellent corrosion resistance while maintaining high tensile strength under load. With UNC coarse threading and Class 3A thread fit, these screws ensure precise installation and reduced cross-threading risks in production environments. The permanent adhesive begins hardening in 15 minutes and reaches full strength within 24 hours, creating durable assemblies that withstand thermal cycling from -60° to 300°F without compromising integrity.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit precision and UNC coarse thread standards. Features include 4-40 thread size, 1/2" length, fully threaded design, and right-hand thread direction. The epoxy thread locker provides permanent locking capability with temperature resistance from -60° to 300°F. Complies with industrial fastener standards for dimensional accuracy and performance requirements.
