Blind rivet nut | Cylindrical head | A2

Do you need a blind rivet nut that provides a strong, permanent thread without requiring access to both sides? The blind rivet nut WS 9315 in stainless steel A2 (AISI 304) is an efficient and durable solution for fastening in thin-walled materials. The cylindrical head provides a robust bearing surface without countersinking, offering increased contact against the workpiece and improved pull-out strength.

The blind rivet nut is installed quickly using standard blind rivet tools and creates a secure and vibration-resistant thread, even in materials where conventional fastening is impossible. Thanks to its construction in stainless A2, it resists corrosion and wear, providing a long service life even in humid and demanding environments.

AREA OF APPLICATION

Suitable for sheet metal, thin-walled profiles, metal enclosures, vehicles, electrical cabinets, and industrial components. Common in the automotive industry, construction, furniture assembly, and general workshop production. The blind rivet nut enables strong and durable fastening without the need to access the back side. Easy to install with blind rivet tools – no welding or through-bolts required.

Watch video: Which blind rivet nut should you choose? Cylinder, countersunk, or semi-hex

TECHNICAL SPECIFICATIONS

Product type: Blind rivet nut
Standard: WS 9315
Grade: A2 / AISI 304 stainless steel
Material class: A2
Thread type: Metric
Head type: Cylinder head
Surface finish: Untreated (natural stainless steel)

FREQUENTLY ASKED QUESTIONS (FAQ)

What distinguishes a blind rivet nut with a cylindrical/flat head (WS 9315) from a countersunk model (WS 9316)?

WS 9315 has a cylindrical flat head that sits on top of the surface after installation:

• High bearing surface and pull-out strength: The flat head distributes the clamping force over a larger area against the sheet metal. This provides superior resistance to pull-out forces compared to countersunk rivet nuts.

• No chamfering required: You avoid the step of countersinking/chamfering the hole edge. Simply drill a straight hole, insert the rivet nut, and crimp – saving significant time in series production.

• Tighter joints: The wide flange of the head provides a more stable physical barrier against moisture and dirt that could otherwise penetrate between the rivet nut and the hole in the metal.

Why is stainless steel A2 (AISI 304) the best choice for threaded rivet joints?

Creating threads in thin-walled materials places high demands on both structural strength and corrosion protection:

• Strong threads that do not wear out: A2 steel (1.4301 / AISI 304) has significantly higher strength than aluminum or brass. This allows the machine thread to withstand higher tightening torques without damage when screwing in and out.

• Permanent rust protection: Withstands weather, wind, outdoor humidity, and industrial environments without flaking or showing corrosion around the drilled hole.

• Maintained clamping force: Stainless steel does not suffer from creep in the same way as softer metals, ensuring that the rivet nut remains firmly secured over time.

What should be considered regarding hole preparation and tools during installation?

1. Correct drill diameter: Drill the hole exactly according to the specified dimension for the respective thread size (e.g., Ø9.1 mm for M6). A hole that is too large can cause the rivet nut to slip when the screw is tightened.

2. Check the grip range: Ensure that the total material thickness of the substrate is within the rivet nut's range. Material that is too thin will prevent the bulge on the back from locking properly.

3. Use a powerful rivet nut tool: Since A2 stainless steel is hard, it requires a manual lever tool, a ratchet tool, or a pneumatic/battery-powered rivet nut tool dimensioned for stainless steel rivet nuts.