S-91205A597 5/16"-24 x 3/4" 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
- Permanent vibration resistance with nylon patch thread locker that maintains secure fastening in dynamic applications
- Exceptional temperature stability with locking performance maintained from -70° to 250°F for demanding environments
- Superior strength-to-weight ratio from alloy steel construction with 170,000 psi tensile strength for critical load-bearing applications
- Precision thread engagement with Class 3A fit ensuring consistent, reliable fastening in high-precision assemblies
- Enhanced corrosion protection through black-oxide surface treatment extending service life in industrial conditions
- Optimized torque transmission with hex socket drive design preventing cam-out and ensuring proper installation
- Regulatory compliance assurance meeting ASME B18.3, ASTM A574, RoHS 3, and REACH standards for global applications
Professional Applications & Engineering Value
This 5/16"-24 UNF socket head cap screw with nylon patch thread locking technology addresses critical vibration-induced loosening challenges in industrial machinery, automotive assemblies, and precision equipment. The black-oxide alloy steel construction provides exceptional 170,000 psi tensile strength while maintaining Rockwell C37 hardness for durability under repeated stress cycles. The fine thread spacing and Class 3A thread fit ensure precise engagement in tapped holes, reducing the risk of cross-threading in automated assembly processes. The permanent nylon patch locking element eliminates the need for separate locking washers or adhesives, streamlining installation while providing reliable fastening from -70° to 250°F temperature ranges common in manufacturing environments.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with ASTM A574 material standards, this socket head cap screw features precision Class 3A thread fit for superior dimensional accuracy. The UNF fine thread configuration (5/16"-24) provides enhanced load distribution in critical applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures suitability for international markets and sensitive applications.
