Nylon Insert Locknuts

South Coast Fasteners, Inc. supplies nylon insert locknuts designed to resist loosening under vibration and shock. These locknuts feature a nylon collar that grips the threads, creating a secure and lasting connection. They are essential in industries such as automotive, construction, aerospace, and machinery where safety and reliability are critical. South Coast Fasteners offers nylon insert locknuts in a variety of grades, metric classes, and finishes to support performance in both light-duty and heavy-duty applications.

Your Supplier for High-Performance Industrial Fasteners

If you're looking for a trusted supplier of wholesale industrial fasteners, South Coast Fasteners is your solution. Contact our Anaheim, CA office to learn more about our product options and how we can support your project needs. For helpful service, fast order turnaround, and high-quality fasteners in bulk or small batches, choose South Coast Fasteners.

Types of Nylon Insert Locknuts We Offer

Grade A Nylon Insert Locknut, Zinc Clear CR+3

These nuts meet Grade A strength requirements and include a zinc clear coating for corrosion protection. They are used in light construction, machinery assembly, and equipment manufacturing where environmental resistance adds service life. The nylon insert provides a vibration-resistant hold, making them dependable in fast-moving or vibration-prone assemblies.

Grade A Nylon Insert Locknut, Zinc Yellow CR+6

These nuts provide the same Grade A performance but with a zinc yellow finish for added visibility and enhanced protection. The yellow coating makes fasteners easy to identify during inspection, which is valuable in electrical, mechanical, and construction work. Their nylon insert ensures secure fastening in environments where loosening could cause safety concerns.

Grade A Nylon Insert Locknut, J500

Built to J500 standards, these locknuts offer greater toughness for challenging conditions. The nylon insert provides added protection against vibration loosening, while the grade ensures mechanical consistency in demanding equipment. They are often used in machinery, structural systems, and industrial equipment.

Grade C Nylon Insert Locknut, Plain

Grade C nylon insert locknuts are heat-treated for strength and provide greater load capacity than Grade A. Their plain finish is suitable for dry, indoor environments such as assembly plants and fabrication shops. With a nylon insert to prevent loosening, they are a practical choice for structural steel connections and heavy-duty fastening.

Grade C Nylon Insert Locknut, NE, Phos & Oil

These nuts are treated with a phosphate and oil coating that enhances lubricity and adds mild corrosion protection. They are often used in automotive assembly, industrial equipment, and machinery where easy installation and moderate resistance to wear are important. The nylon insert ensures they remain secure under vibration.

Grade C Nylon Insert Locknut, NE, Zinc Yellow CR+6

These nuts combine the strength of Grade C steel with the protective benefits of a zinc yellow coating. The finish provides excellent visibility and corrosion resistance, making them useful in outdoor construction, equipment manufacturing, and applications requiring regular inspection. The nylon insert offers secure fastening in high-vibration conditions.

Metric Class 8 Nylon Insert Locknut, Zinc CR+3

These metric locknuts provide Class 8 strength with a zinc clear finish for moderate corrosion resistance. They are common in European automotive systems, OEM assemblies, and international construction projects. Their nylon inserts deliver reliable locking performance under continuous vibration.

Metric Class 8 Nylon Insert Locknut, Zinc Yellow CR+6

These nuts provide the same Class 8 performance with a zinc yellow finish for visibility and improved protection. They are frequently chosen in industrial machinery, automotive equipment, and construction assemblies where inspection and durability are equally important.

Metric Class 8 Nylon Flange Locknut, Non Serrated, DIN 6926, Zinc CR+3

These flange locknuts provide a wide bearing surface that distributes load evenly without serrations. The zinc clear coating offers resistance to corrosion, making them ideal for automotive, machinery, and equipment manufacturing. The nylon insert delivers strong locking action, eliminating the need for additional locking components.

Metric Class 8 Nylon Flange Locknut, Non Serrated, DIN 6926, Zinc Yellow CR+6

These flange locknuts provide the same benefits as zinc clear versions but with a yellow finish for enhanced corrosion resistance and visibility. The wide flange supports assemblies by spreading load, while the nylon insert prevents loosening under dynamic forces. They are suited for heavy machinery and construction equipment.

Metric Class 10 Nylon Insert Thin Locknut, Zinc CR+3

These thin-profile locknuts are manufactured to Class 10 strength for high-stress applications with limited space. The zinc clear finish provides corrosion resistance, while the nylon insert ensures a secure hold. They are used in machinery, aerospace equipment, and industrial applications where strength and compact design are both required.

Metric Class 10 Nylon Flange Locknut, Non Serrated, DIN 6926, Zinc Yellow CR+6

These locknuts provide Class 10 strength with a zinc yellow finish that adds protection and visibility. The flange spreads load evenly across the surface, and the nylon insert prevents loosening in vibration-heavy assemblies. They are commonly used in construction, transportation, and industrial steelwork.

Material Options

South Coast Fasteners stocks nylon insert locknuts in materials engineered for strength and performance in vibration-prone environments.

Low Carbon Steel (Grade A)

Low carbon steel is commonly used for light-duty nylon insert locknuts. It provides dependable fastening strength at an economical cost, making it suitable for consumer goods, electronics, and light construction. Combined with a nylon insert, these nuts deliver secure fastening in everyday applications.

Medium Carbon Steel (Grade C)

Medium carbon steel provides greater strength and durability than Grade A. These locknuts are heat-treated for toughness, making them appropriate for construction, machinery, and structural connections. They perform well in environments where vibration and heavy loads are present.

Hardened Alloy Steel (Metric Class 8 and 10)

These locknuts are manufactured from alloy steels hardened for maximum performance. They are widely used in international projects, automotive systems, and industrial equipment. Their nylon inserts provide locking reliability in assemblies subjected to heavy vibration and shock.

Nylon Inserts

The nylon collars integrated into these locknuts deliver the locking action that distinguishes them from standard nuts. By gripping the bolt threads, nylon inserts prevent loosening even under vibration, ensuring safety in demanding applications.

Available Finishes

South Coast Fasteners offers nylon insert locknuts in a variety of finishes to improve protection, extend life, and support identification in the field.

Plain

Plain locknuts are untreated and intended for use in dry or indoor environments. They are economical and effective where exposure to corrosion is not an issue.

Phosphate and Oil

This treatment provides mild corrosion resistance and a lubricated surface for easier installation. It is commonly used in automotive assembly and machinery where fast installation and wear resistance are priorities.

Zinc Clear CR+3

Zinc clear plating protects against corrosion while giving the fastener a clean metallic appearance. This finish is widely applied in construction, light machinery, and equipment exposed to moderate environmental conditions.

Zinc Yellow CR+6

This finish provides enhanced corrosion resistance along with a bright yellow color for visibility. It is common in electrical assemblies, inspection-critical projects, and applications requiring both protection and identification.

Hot-Dip Galvanized and Wax Options

Some nylon insert locknuts are treated with hot-dip galvanizing or wax to further improve corrosion resistance and installation ease. These enhancements are valuable in infrastructure, construction, and outdoor equipment projects.

Why Choose South Coast Fasteners?

South Coast Fasteners supplies nylon insert locknuts with the strength, finishes, and designs needed to handle vibration-prone assemblies. With a range of grades, metric classes, and finishes, our inventory is built to serve industries from automotive to structural steel. Customers choose us for practical expertise and a reliable supply chain that ensures projects stay on schedule.

Order Nylon Insert Locknuts Online Today

Order nylon insert locknuts online today with South Coast Fasteners and get dependable fasteners shipped quickly. Whether you need light-duty options for small assemblies or heavy-duty locknuts for industrial steelwork, our stocked supply ensures you get exactly what you need without delay.