S-91205A349 10-32 x 1 1/4" ASME B18.3, ASTM A574 Alloy Steel Thread-Locking Socket Head Screws

Key Features & Benefits at a Glance

• Permanent vibration resistance with nylon patch thread locker that maintains secure fastening in high-stress environments
• Exceptional temperature stability with reliable performance across -70° to 250°F operating range
• Superior mechanical strength with 170,000 psi tensile strength and Rockwell C37 hardness for heavy-duty applications
• Precision thread engagement with Class 3A fit and 10-32 UNF fine threads ensuring consistent clamping force
• Corrosion-resistant black-oxide coating on alloy steel for enhanced durability in industrial environments
• Secure hex drive compatibility with 5/32" drive size providing reliable torque transmission and installation
• Partially threaded design offering optimal grip length control for precise joint assembly

Professional Applications & Engineering Value

These 10-32 UNF socket head cap screws with nylon patch thread locker address critical vibration-induced loosening in demanding industrial applications. The black-oxide alloy steel construction combined with Class 3A thread fit ensures precise engagement in machinery, automotive assemblies, and precision equipment where thermal cycling and dynamic loads compromise standard fasteners. The fine UNF threads provide superior resistance to vibrational loosening while maintaining consistent clamping force in high-temperature environments up to 250°F. Engineered for maintenance-critical applications, these socket head screws deliver reliable performance in manufacturing equipment, transportation systems, and industrial machinery where fastener failure is not an option.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with ASTM A574 material standards, these screws feature precision Class 3A thread fit with 10-32 UNF fine threads and partial threading configuration. The 1 1/4" length provides optimal engagement while maintaining dimensional accuracy. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. The right-hand thread direction with standard socket head profile ensures compatibility with existing tooling and assembly processes.