S-91412A330 5/16"-18 x 3/4" Stainless Steel Thread-Locking Hex Head Screws
Stainless Steel Thread-Locking Hex 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
- Vibration-resistant locking with permanent nylon patch thread locker that maintains secure fastening from -55° to 250°F
- Superior corrosion resistance thanks to 18-8 stainless steel construction for extended service life in harsh environments
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and stress conditions
- Precise thread engagement with Class 2A UNC coarse threads for quick installation and superior holding power
- Durable external hex drive provides excellent torque transmission and prevents stripping during installation
- Full threading along the entire 3/4" length maximizes grip strength and distribution of clamping force
- Compliance ready with RoHS 3 and REACH regulations for use in regulated industrial applications
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these 18-8 stainless steel hex head screws combine corrosion resistance with reliable vibration-proof performance. The nylon patch thread locker eliminates the need for separate locking washers or chemical adhesives, providing permanent resistance to loosening in machinery, automotive assemblies, and structural frameworks. With 70,000 psi tensile strength and Rockwell B70 hardness, these UNC coarse thread screws maintain integrity under dynamic loads and thermal cycling from -55° to 250°F. The external hex drive and Class 2A thread fit ensure precise installation in high-volume production settings while the fully threaded design maximizes connection stability in critical joints.
Specification Summary & Compliance
This 5/16"-18 x 3/4" hex head screw features UNC coarse threads with Class 2A thread fit for standard industrial applications. Manufactured from 18-8 stainless steel with 0.3125" thread diameter and fully threaded construction. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety and restricted substances.
