1/2-13 Nylon Lock Nuts (20 Pack) – Grade C Vibration-Resistant Locking Nuts Coarse Thread for Trailers, Racks & General Mounting – Heavy-Duty Fasteners SAE J995 0.5"

Key features

• SAE Grade C Strength: Manufactured from high-strength alloy steel to meet Grade C performance expectations for demanding fastening applications and vibration control. SAE J995. 20-pack.
• Premium Vibration-Resistant Nylon Locking: Nylon insert resists loosening caused by vibration, movement, and road shock—ideal for trailers, racks, mounts, and general hardware.
• Familiar, Easy-to-Use Design: Proven nylon lock style preferred for maintenance, replacement, and DIY use.
• Ideal for Road & Utility Vibration: Commonly used on trailers, carriers, racks, and mounted accessories exposed to continuous movement.
• Standard 1/2-13 Coarse Thread: Compatible with common 1/2-13 Grade 5 and Grade 8 bolts. Nylon is resistant to temperatures up to 250° F. SAE J995 Material and Physical Properties. ASME B18.16.6 Dimensional Requirements. IFI 100/107 Material and Physical Properties. ASME B1.1 Thread Requirements. ASTM F812 Surface Discontinuities. ASME B18.18 Inspection and Quality Assurance. HRC 24/32.

These 1/2-13 Nylon Lock Nuts are built for applications where vibration resistance and dependable strength matter. Made from SAE Grade C–class alloy steel, each nut features a nylon insert that resists loosening under movement, making them a reliable choice for trailers, racks, mounts, and general vibration-prone assemblies. Compatible with up to and including a Grade 8 bolt. The familiar nylon lock design offers a balance of security and ease of installation, making it ideal for repairs, replacements, and everyday heavy-duty use.

Free shipping included. 30-day hassle-free returns.