Welded Fasteners | Knapp Fasteners Inc.

Welded fasteners are very important in industries where permanent attachments are required. These fasteners are integral to the structure to provide high strength and durability. The most popular industries they’re used in are automotive, aerospace, construction, and manufacturing. Below we’ll discuss the main types of welded fasteners, uses, and materials.

Types of Welded Fasteners

Weld Nuts

Weld nuts are designed to be permanently affixed to a metal surface, providing a threaded hole for bolts or other fasteners. They are available in several styles. The most popular types are:

Hex Weld Nuts Available in long and short pilot projections, these nuts are commonly used in applications where strong, vibration-resistant fastening is needed.
Tab Weld Nuts Featuring a small tab for easy positioning, these nuts are ideal for sheet metal applications. These are available in a large variety of types including S1 series and S2 series.
Square Weld Nuts A less common but effective option, square weld nuts provide additional surface area for better load distribution.

Weld Pins

Weld pins are used primarily in insulation fastening, HVAC systems, and industrial applications. They create a strong mechanical connection and are often paired with a locking washer to secure insulation materials. We can cross majority of manufacturer part numbers for these.

Weld Screws

Weld screws function similarly to weld studs but include a threaded shaft, allowing components to be bolted together. These are frequently used in automotive manufacturing and structural applications where high strength is required.

Weld Studs

Weld studs provide a strong anchor point on metal surfaces. Commonly found in construction, shipbuilding, and heavy machinery, they eliminate the need for through-holes and improve structural integrity.

Welded Rings

Welded rings are used in lifting, securing, and rigging applications. These rings are permanently welded to a structure, ensuring a strong, reliable attachment point for hooks, chains, or cables. It’s important to make sure that the rings are rated for the appropriate load that you’re using it for.

Materials and Applications

Welded fasteners are typically made from carbon steel, alloy steel, and stainless steel, each offering different levels of strength and corrosion resistance. These fasteners are widely used across various industries. In automotive and transportation, weld nuts and screws secure structural components in vehicles, trailers, and heavy-duty machinery. In aerospace, high strength welded fasteners are essential for aircraft and military equipment, ensuring durability in extreme conditions. The construction and infrastructure sector relies on weld studs and rings to provide strong anchor points for structural components. Additionally, in HVAC and insulation applications, weld pins secure insulation within ventilation systems and industrial environments.

Selecting the correct welded fastener depends on factors like material compatibility, load requirements, and environmental conditions. We can source a large variety of welded products and have many in stock. Check out our product page here to view our welded products or reach out to our sales team to get a quote today!