S-90343A121 8-32 x 5/8" 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 under dynamic loads
- Superior corrosion resistance from 18-8 stainless steel construction for long-term reliability in harsh environments
- High-strength performance with 70,000 psi tensile strength and Rockwell B70 hardness for demanding applications
- Precision Class 3A thread fit ensuring consistent engagement and reduced risk of cross-threading
- Wide temperature tolerance maintaining secure fastening from -60°F to 300°F without performance degradation
- Industry-standard compliance with ASME B18.3 specifications for guaranteed interchangeability and quality
- Quick-setting adhesive begins hardening in 15 minutes and reaches full strength within 24 hours
Professional Applications & Engineering Value
Engineered for critical industrial applications where vibration-induced loosening compromises assembly integrity, these socket head cap screws integrate permanent epoxy thread locker directly into the UNC coarse threading. The 18-8 stainless steel construction provides excellent corrosion resistance while maintaining 70,000 psi tensile strength in environments ranging from cryogenic to high-temperature operations. The Class 3A thread fit ensures precise engagement in tapped holes, reducing installation torque requirements while preventing back-out in machinery, automotive, and aerospace assemblies. With hex drive compatibility and full threading, these fasteners deliver reliable performance in vibration-prone equipment where disassembly isn't anticipated.
Specification Summary & Compliance
This 8-32 UNC thread socket head cap screw features Class 3A thread fit precision and complies with ASME B18.3 specifications. The epoxy thread locker begins hardening in 15 minutes and reaches full strength within 24 hours, operating effectively across a temperature range of -60°F to 300°F. Manufactured from 18-8 stainless steel with Rockwell B70 hardness and 70,000 psi tensile strength, these screws meet industrial standards for permanent fastening applications.
