Buy All Metal Locknuts Online at South Coast Fasteners

Types of All Metal Locknuts

Serrated Flange Hex Locknut, Case Hardened, Zinc CR+3

These locknuts feature serrations on the flange to grip the surface and resist loosening. The case-hardened design increases wear Resistant, while the zinc clear finish offers corrosion protection. They are commonly used in machinery, automotive applications, and assemblies subject to vibration.

External Tooth K Lock Hex Locknut, Zinc CR+3

These locknuts have external teeth that bite into the mating surface, creating a secure hold. The zinc clear finish resists corrosion, making them ideal for equipment and electrical assemblies. Their design eliminates the need for washers while providing strong locking action.

Grade C Hex All Metal Cone Locknut, Zinc CR+3 & Wax

These Grade C cone locknuts rely on their conical shape to create friction against the bolt threads. With zinc clear plating and wax lubrication, they offer corrosion Resistant and easier installation. They are suited for structural steelwork, construction, and heavy machinery.

Grade G Hex Flange Cone Locknut Without Serration, 2 Opposite Oval Lock, Phos & Oil

These flange cone locknuts use a two-point oval deformation for locking rather than serrations. The phosphate and oil finish provides lubricity and mild corrosion protection. They are often applied in machinery, automotive equipment, and assemblies requiring smooth bearing surfaces.

Grade A Reversible Hex Locknut, Zinc CR+3

Reversible locknuts can be installed in either orientation, making assembly faster and easier. The zinc clear finish provides corrosion Resistant while maintaining strength. They are used in automotive, light construction, and equipment where time efficiency and reliability matter.

Flexloc, Full Height Locknut, Plain

Flexloc locknuts rely on slotted ends that flex to grip the bolt threads. The plain finish makes them cost-effective for indoor use or protected assemblies. They are commonly used in manufacturing, automotive, and general industrial applications.

Flexloc, Full Height Locknut, Cadmium

These Flexloc locknuts use cadmium plating for enhanced corrosion Resistant and lubricity. They are widely applied in aerospace, defense, and high-performance equipment where both durability and smooth installation are critical.

All Metal Locknuts - Material Options

South Coast Fasteners stocks all metal locknuts in materials designed for strength, toughness, and performance in high-vibration or high-temperature environments.

Case Hardened Steel

Case hardened steel provides excellent wear Resistant, making it ideal for serrated and toothed locknuts that rely on surface engagement. These nuts are used in machinery, automotive systems, and assemblies where durability is critical.

Medium Carbon Steel (Grades A and C)

Medium carbon steel delivers strength and toughness for structural and industrial fastening. These grades are heat-treated for added performance and are used in construction, equipment, and heavy machinery.

Alloy and Specialty Steels (Grades G)

These materials are engineered for maximum performance in demanding applications. Alloy steels are used in aerospace, industrial plants, and infrastructure where heavy vibration and high temperatures are common.

Flexloc Design with Deformation Steel

Flexloc locknuts are made from steel designed to flex and deform under load. This provides locking power without additional inserts, making them effective in dynamic applications across multiple industries.

All Metal Locknuts - Available Finishes

South Coast Fasteners offers all metal locknuts in finishes that enhance durability, extend service life, and improve ease of installation.

Plain

Plain finishes are cost-effective and suitable for indoor or controlled conditions. They are common in machinery, assembly plants, and protected environments.

Phosphate and Oil

This treatment improves lubricity and offers mild corrosion Resistant. It is widely used in automotive, machinery, and industrial equipment where smooth installation is valuable.

Zinc Clear CR+3

Zinc clear plating provides corrosion Resistant and a clean metallic look. It is a Standard finish in automotive, equipment, and construction assemblies.

Zinc Yellow CR+6

This finish offers corrosion protection with added visibility for inspection. It is useful in construction, electrical systems, and projects requiring frequent quality checks.

Wax and Lubricated Coatings

Wax reduces friction and aids installation, making it easier to tighten locknuts in field conditions. These coatings are especially useful in heavy structural projects and machinery assembly.

Cadmium

Cadmium plating provides excellent corrosion Resistant and lubricity. It is often specified in aerospace, defense, and high-performance equipment due to its protective qualities.

Why Choose South Coast Fasteners?

South Coast Fasteners is the single source professionals trust for fasteners, PPE, industrial supplies, hand tools, cutting tools, and abrasives, backed by the inventory and expertise to support any application. We take pride in accurate orders, responsive service, and pricing that works for any volume. With stocked inventory and fast shipping, we are ready to support your next order and every one after it.

Shop All Metal Locknuts Online at South Coast Fasteners

South Coast Fasteners stocks a wide range of materials, grades, and thread sizes suited for demanding applications. Relying on a distorted or prevailing torque thread form rather than a nylon insert, these locknuts are the preferred choice for high-temperature environments and applications where reusability is required. With competitive pricing and fast shipping, we are your reliable source for all metal locknut solutions.