Nylon Insert Locknuts
Nylon Insert Locknuts (Nyloc Nuts) – Reliable Locking for Vibration-Prone Assemblies
Nylon insert locknuts, commonly called nyloc nuts, are a proven fastening solution when applications demand dependable vibration resistance, reusability, and ease of installation. These locknuts feature a non-metallic nylon collar positioned at the top of the nut. During installation, the nylon insert deforms over the mating threads, creating prevailing torque that resists loosening from vibration, shock, and dynamic loads—without damaging the bolt threads.
How Nylon Insert Locknuts Work
The nylon insert applies continuous pressure against the threads, maintaining clamp load even after repeated use. This mechanical resistance helps prevent back-off in moving or vibrating assemblies, making nyloc nuts a cost-effective alternative to thread lockers or more complex all-metal locking solutions.
Common Applications
Nylon insert locknuts are widely used in automotive assemblies, aerospace components, electronics, HVAC systems, industrial machinery, and household appliances. They perform best in standard and low-heat environments, offering reliable locking where extreme temperatures are not a concern. These locknuts are not recommended for temperatures above approximately 250°F (120°C), where the nylon insert may soften or lose effectiveness.
Types and Grades of Nylon Insert Locknuts
Available Styles
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Standard Hex Nylon Insert Locknuts – Low and full height options
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Flange Nylon Insert Locknuts – Integrated flange for improved load distribution
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Thin Pattern Locknuts – Ideal for space-restricted assemblies
Strength Classifications
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Fractional Sizes: Grade 2, Grade 5, Grade 8
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Metric Sizes: Class 6, 8.8, 10.9
Specifications
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Materials: Carbon steel, stainless steel (18-8, 316), brass
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Finishes: Zinc Cr3, black oxide, cadmium, and more
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Thread Types: UNC, UNF, metric coarse and fine
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Sizes: #4-40 to 1"-8+, M3 to M30+
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Standards: ASME B18.16.6, DIN 985, ISO 10511
A Smart, Cost-Effective Locking Solution
When you need easy installation, dependable vibration resistance, and reusability, nylon insert locknuts deliver consistent performance and peace of mind. Need help selecting the right size, material, or grade? Our team is ready to help you fasten with confidence.