Weld nut | A2 | DIN 929

Do you need a nut that can be permanently welded onto surfaces for secure and stable fastening? The Weld Nut A2 DIN 929 in A2 / AISI 304 stainless steel is designed to provide long-lasting strength and corrosion resistance. It is easy to weld onto metal surfaces, creating a reliable connection that withstands mechanical stress and vibrations. The nut is ideal for both industrial and construction-related applications where a permanent attachment is required.

AREA OF USE

Perfect for weld mounting on machines, steel frames, building constructions, and equipment where permanent fasteners are needed. The weld nut is used to create a secure fastening point for screws and bolts and is easy to combine with standard tools during component assembly. Its corrosion resistance makes it suitable for both indoor and outdoor environments.

TECHNICAL SPECIFICATIONS

Product type: Weld nut
Standard: DIN 929
Quality: A2 / AISI 304 stainless steel
Material class: A2-70
Thread type: Metric ISO thread
Surface finish: Untreated (natural stainless steel)
Head shape: Hexagonal
Grip type: External hexagon

FREQUENTLY ASKED QUESTIONS (FAQ)

What characterizes a weld nut according to DIN 929 and how do the welding projections work?

DIN 929 specifies a hexagonal weld nut with three raised welding projections (weld points) on the underside:

• Precise resistance welding: The three welding projections concentrate the current and heat during spot welding or resistance welding. This allows the nut to fuse perfectly with the base material without damaging the internal thread.

• Permanent and vibration-proof thread point: Once the nut is welded, it forms a homogeneous unit with the sheet metal or profile. It cannot loosen, rotate, or rattle, making it excellent for chassis, machine stands, and equipment exposed to strong vibrations.

• Time-saving for blind mounting: Creates a fixed thread on the back of housings and beams where it is impossible to access with a fixed wrench for future assembly or maintenance.

Why choose stainless steel A2 (AISI 304) when welding nuts?

Welding stainless steel constructions places high demands on the material's composition to preserve corrosion protection:

• Good weldability: A2 steel (1.4301 / AISI 304) has a low carbon content and good welding properties, resulting in strong, crack-free weld seams for both spot welding and TIG welding.

• Lasting corrosion protection: Resists moisture, outdoor environments, and damp industrial premises without rusting or weakening around the weld zone.

• No peeling surface coating: Unlike electro-galvanized weld nuts, you avoid hazardous zinc fumes during welding and the risk of burning off the zinc layer, which could cause the nut to start rusting.

What should you consider to achieve a successful welding result with DIN 929?

1. Clean the surfaces thoroughly: Ensure that the sheet metal or profile is completely free from grease, oil, paint, and oxides where the welding projections will make contact.

2. Protect the thread during TIG welding: If you are TIG welding by hand instead of using spot welding, be careful not to place the weld bead too close to the thread opening to prevent spatter or thermal deformation from ruining the threads.

3. Use the right filler material and lubricant: Use stainless filler material that matches A2 steel and apply anti-seize paste to the screw during final assembly to prevent galling.