S-90343A130 1/4"-20 x 1/2" ASME B18.3 18-8 Stainless Steel Thread-Locking Socket Head Screws
18-8 Stainless Steel Thread-Locking Socket Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Permanent vibration resistance with epoxy thread locker that cures to full strength, preventing loosening in high-stress applications
- Superior corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial environments and outdoor use
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and mechanical stress
- Precise Class 3A thread fit for secure, accurate mating with nuts and tapped holes, reducing assembly issues
- Wide temperature tolerance from -60° to 300°F, maintaining integrity in extreme thermal cycling conditions
- Standard hex drive design allows for easy installation with common tools, speeding up assembly processes
- ASME B18.3 compliance guarantees consistent quality and interchangeability in professional applications
Professional Applications & Engineering Value
This 18-8 stainless steel socket head cap screw with permanent epoxy thread locker is engineered to solve critical fastening challenges in demanding environments. The 1/4-20 UNC coarse thread and Class 3A fit provide excellent engagement in metals and plastics, reducing cross-threading risks during high-volume assembly. Its Rockwell B70 hardness and 70,000 psi tensile strength ensure long-term reliability in machinery, automotive, and aerospace applications where vibration and thermal cycling cause standard fasteners to fail. The integrated epoxy adhesive begins hardening in 15 minutes and reaches full cure in 24 hours, creating a tamper-resistant bond ideal for safety-critical components and permanent installations.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with 1/4"-20 UNC Class 3A threads and coarse thread spacing. Features a 3/16" hex drive, fully threaded design, and right-hand thread direction. The epoxy thread locker withstands temperatures from -60° to 300°F. Complies with industrial standards for dimensional accuracy and material properties.
