S-91412A350 5/16"-18 x 1 1/4" 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 that maintains secure fastening in high-motion environments
- Exceptional corrosion resistance thanks to 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
- Temperature stability with locking functionality maintained across extreme temperatures from -55°F to 250°F
- Precise thread engagement through Class 2A UNC coarse threads ensuring reliable installation and compatibility
- Full-threaded design providing maximum grip length and uniform stress distribution along the entire fastener
- Easy installation with standard external hex drive allowing for high torque application and secure tightening
Professional Applications & Engineering Value
Engineered for industrial environments where vibration loosening compromises safety and performance, these nylon patch locking hex screws deliver permanent fastening security without compromising disassembly capability. The 18-8 stainless steel construction provides superior corrosion resistance in chemical, marine, and outdoor applications, while the UNC coarse threads and Class 2A fit ensure quick installation and reliable performance in machinery, equipment manufacturing, and structural assemblies. The temperature-resistant nylon patch maintains consistent locking force across extreme thermal cycles, making these fasteners ideal for automotive, aerospace, and industrial equipment subjected to dynamic loads and environmental challenges.
Specification Summary & Compliance
These 5/16"-18 x 1-1/4" hex head screws feature UNC coarse threads with Class 2A thread fit for precise dimensional accuracy and compatibility with standard components. Manufactured from 18-8 stainless steel with fully threaded design and external hex drive configuration. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use.
