1/2-13 All-Metal Top Lock Nuts (25 Pack) – Grade 8 High-Temperature, Vibration-Resistant Coarse Thread Locking Nuts for Critical Joints SAE J995 0.5"

These 1/2-13 All-Metal Prevailing Torque Top Lock Nuts are engineered for professional and industrial use where vibration, heat, and load demand uncompromising performance. Manufactured from SAE Grade 8–class alloy steel, the top-lock design provides consistent locking force without nylon components. Ideal for automotive assemblies, heavy equipment, and structural joints where reliability is critical.

• SAE Grade 8 Performance: High-strength alloy steel designed for critical fastening applications. SAE J995. 25-pack.
• All-Metal Locking Design: No nylon insert—maintains locking force under heat and vibration. Crowned top that is crimped to create the locking feature with prevailing torque.
• High-Temperature Capable: Suitable for automotive, equipment, and industrial environments.
• Designed for Critical Joints: Preferred where loosening is not acceptable.
• Standard 1/2-13 Coarse Thread: Compatible with common Grade 8 coarse-thread bolts. Manufactured to IFI 100/107 specifications. SAE J995.