S-91205A544 1/4"-20 x 1 1/4" ASME B18.3, ASTM A574 Alloy Steel Thread-Locking Socket Head Screws
Alloy 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
- Exceptional vibration resistance through Nylon Patch thread locker, preventing loosening in high-stress environments
- Superior tensile strength of 170,000 psi ensures reliable performance under extreme mechanical loads
- Enhanced corrosion protection with Black-Oxide finish on Alloy Steel for extended service life
- Precision Class 3A thread fit provides secure fastening with minimal play in critical assemblies
- Wide temperature tolerance from -70° to 250°F maintains integrity across diverse operating conditions
- Optimized drive engagement with hex socket design for high torque application without stripping
- Industry-standard compliance ensures compatibility and reliability in professional applications
Professional Applications & Engineering Value
These socket head cap screws with Nylon Patch thread locking technology address critical vibration-induced failure points in machinery, automotive, and aerospace assemblies. The Black-Oxide Alloy Steel construction combined with Class 3A UNC coarse threads delivers exceptional clamp load retention where precision matters most. Engineered for high-stress applications, the 170,000 psi tensile strength and Rockwell C37 hardness ensure dimensional stability under cyclic loading, while the temperature-resistant nylon patch maintains locking performance across extreme environmental conditions. The hex drive socket head design allows for compact installation in confined spaces without compromising torque capability.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit precision and UNC 1/4"-20 coarse threading. Fully compliant with ASTM A574 material standards, RoHS 3 (2015/863/EU) environmental directives, and REACH (EC 1907/2006) chemical safety regulations. Features fully threaded design with right-hand thread direction and maintains specified mechanical properties across the operational temperature range of -70° to 250°F.
