S-91205A338 10-32 x 1/4" ASME B18.3, ASTM A574 Alloy Steel Thread-Locking Socket Head Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with permanent nylon patch that maintains secure fastening in high-stress environments
• Exceptional tensile strength of 170,000 psi ensures reliable performance under heavy loads and extreme conditions
• Temperature stability with locking functionality maintained across a wide range from -70° to 250°F
• Precise thread engagement with Class 3A fit provides superior clamping force and vibration resistance
• Corrosion protection through black-oxide coating on alloy steel for extended service life in industrial settings
• Optimal drive efficiency with hex socket design and 5/32" drive size for secure tool engagement and torque transmission
• Industry compliance meeting ASME B18.3 and ASTM A574 specifications for guaranteed quality and interchangeability

Professional Applications & Engineering Value

These 10-32 UNF nylon patch locking socket head cap screws deliver critical vibration resistance in demanding applications where loosening under dynamic loads poses significant safety and performance risks. The black-oxide alloy steel construction combined with fine thread configuration and Class 3A thread fit ensures precise engagement and consistent clamping force across machinery, automotive assemblies, and precision equipment. The permanent nylon patch locking technology eliminates the need for secondary locking devices while maintaining reliability across extreme temperature variations from -70° to 250°F. Engineered to ASME B18.3 standards with 170,000 psi tensile strength, these screws provide durable fastening solutions for industrial maintenance, manufacturing equipment, and heavy-duty assemblies where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with material compliance to ASTM A574, these socket head cap screws feature precision Class 3A thread fit with 10-32 UNF fine threads for optimal engagement. The black-oxide surface treatment on alloy steel provides corrosion resistance while maintaining dimensional stability. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures safe use across global industrial markets. The Rockwell C37 hardness rating and 170,000 psi tensile strength guarantee mechanical performance meeting rigorous industrial fastener requirements.