S-93705A541 1/4"-20 x 7/8" 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 integrated nylon patch thread locker that eliminates the need for separate locking washers
- Superior corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial environments
- Maximum torque transmission through the 3/16" hex drive design, preventing tool slippage and head stripping
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for heavy-duty applications
- Wide temperature compatibility maintaining locking performance from -70° to 250°F without degradation
- Precision thread engagement with Class 3A UNC coarse threads ensuring reliable fastening in high-vibration settings
- Streamlined installation using standard hex tools with the familiar socket head profile for efficient assembly
Professional Applications & Engineering Value
These 18-8 stainless steel socket head cap screws deliver critical performance where vibration resistance and material integrity are paramount. The permanent nylon patch thread locker addresses the fundamental industrial challenge of fastener loosening under dynamic loads, eliminating costly maintenance and potential equipment failure. With their UNC Class 3A thread fit and coarse thread spacing, these fasteners provide rapid installation and superior clamping force in machinery, automotive assemblies, and precision equipment. The combination of high tensile strength and temperature resistance makes them ideal for demanding applications where both mechanical stress and environmental factors are concerns, from manufacturing fixtures to outdoor equipment assemblies.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit precision and UNC 1/4"-20 thread configuration. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features include 7/8" length, 3/16" hex drive, right-hand thread direction, and fully threaded design for consistent performance across the entire fastener length.
