S-93705A589 5/16"-18 x 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 the integrated nylon patch thread locker that prevents loosening under dynamic loads
- Superior corrosion resistance provided by 18-8 Stainless Steel construction, ideal for harsh industrial environments
- High-strength reliability with a 70,000 psi tensile strength and Rockwell B70 hardness for demanding applications
- Wide temperature tolerance from -70° to 250°F, ensuring consistent performance in extreme conditions
- Precise thread engagement with a Class 3A thread fit for secure, accurate fastening and reduced risk of cross-threading
- Easy installation and removal using a standard 1/4" hex drive, providing efficient maintenance and assembly
- Versatile partial threading design allowing for controlled clamp load and alignment in precision assemblies
Professional Applications & Engineering Value
Engineered for industrial durability, this 5/16"-18 UNC Socket Head Cap Screw with a nylon patch locking feature addresses critical challenges in machinery, automotive, and aerospace sectors where vibration-induced loosening can lead to equipment failure. The 18-8 Stainless Steel material offers excellent resistance to rust and chemicals, extending service life in corrosive environments. Its coarse UNC thread and Class 3A fit ensure quick, reliable installation with high clamping force, reducing assembly time and maintenance costs. Ideal for applications requiring high tensile strength and temperature stability, this fastener provides a secure, long-lasting solution for structural and mechanical assemblies.
Specification Summary & Compliance
This screw features a 5/16"-18 UNC coarse thread with a Class 3A thread fit for precision and strength. It complies with ASME B18.3 specifications, ensuring consistent manufacturing quality. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety standards for global industrial use.
