S-91205A629 3/8"-24 x 1 1/2" 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
- Vibration-resistant locking with nylon patch thread locker maintains secure fastening in temperatures from -70° to 250°F, reducing maintenance needs
- Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress industrial loads
- Precision Class 3A thread fit provides superior engagement and reduces the risk of cross-threading during assembly
- Corrosion-resistant black-oxide finish on alloy steel enhances durability in demanding environments
- Standard hex socket drive allows for high-torque installation with common tools, improving installation efficiency
- Fully threaded design offers consistent clamping force along the entire 1-1/2" length for uniform load distribution
- Compliance with ASME B18.3 and ASTM A574 guarantees consistent quality and interchangeability in professional applications
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in machinery assembly, automotive systems, and heavy equipment where vibration loosening and high tensile loads are common. The 3/8"-24 UNF fine threads with Class 3A fit ensure precise alignment and reduced galling in high-cycle applications, while the integrated nylon patch thread locker secures joints without requiring additional adhesives. Its Rockwell C37 hardness and 170,000 psi tensile strength provide reliable performance in structural frames, precision instruments, and motor mounts, minimizing downtime and replacement costs. The fully threaded design allows for adjustable fastening depth, making it ideal for assemblies requiring fine adjustments and uniform stress distribution.
Specification Summary & Compliance
This socket head cap screw features a Class 3A thread fit with 3/8"-24 UNF fine threads and a fully threaded 1-1/2" length. Manufactured to ASME B18.3 specifications with material compliance to ASTM A574, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safety and regulatory adherence for global industrial use.
