S-91205A148 6-32 x 1/2" ASME B18.3, ASTM A574 Alloy Steel Thread-Locking Socket Head Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with nylon patch thread locker maintains secure fastening in temperatures from -70° to 250°F
• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress industrial loads
• Precise Class 3A thread fit delivers superior engagement and reduced risk of cross-threading in assembly operations
• Corrosion-resistant black-oxide finish on alloy steel provides enhanced durability in demanding environments
• Standard hex socket drive (7/64") allows for high-torque installation with common Allen wrenches
• Full thread coverage along the 1/2" length enables flexible positioning and consistent clamping force
• Rockwell C37 hardness offers excellent wear resistance and long-term fastener integrity

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw addresses critical vibration loosening and alignment challenges in precision equipment. The nylon patch thread locker creates consistent friction to prevent back-off in machinery subjected to dynamic loads or thermal cycling, while the UNC coarse thread and Class 3A fit ensure rapid assembly with minimal thread galling. Ideal for industrial fastening in automotive subassemblies, electronic enclosures, and production tooling where high tensile strength and temperature stability are paramount. The combination of alloy steel construction and controlled hardness (Rockwell C37) provides reliable performance in high-cycle applications.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with material compliance to ASTM A574. Features UNC coarse threads with precision Class 3A fit for consistent engagement. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Right-hand threaded with standard socket head profile and 7/64" hex drive.