T-nut | Countersunk head | A2 | WS 9340

Slotted nut with oval countersunk head A2 WS 9340 in A2 stainless steel is intended for use in indoor and outdoor environments with normal corrosive stress. The product (art. no. WS 9340) is used where countersunk, demountable fastening with a through-bolt is required. The design with an oval countersunk head provides a flush and integrated mounting surface, while the cylindrical sleeve part enables stable metric internal thread fastening in wood, composite, and panel materials. It is suitable for professional installations where dimensional accuracy and consistent function are critical.

AREA OF APPLICATION

The product is used in the furniture industry, interior installation, construction, and technical installations. It is intended for applications where countersunk mounting from one side is combined with a metric internal thread for a through-bolt. The A2 material selection provides corrosion resistance in normal outdoor environments as well as good resistance to moisture and atmospheric exposure. The product is not intended for marine environments or environments containing chlorides.

TECHNICAL SPECIFICATIONS

Product type: Nut
Product family: Slotted nut, oval countersunk head
Material class: A2
Strength class: Not specified
Standard: Non-standardized (art. no. WS 9340)
Drive type: Slotted
Design: Oval countersunk head
Surface finish: Bright
Environment: Indoor / Outdoor
Delivery unit: Each

FREQUENTLY ASKED QUESTIONS (FAQ)

What is a slotted nut with an oval countersunk head (WS 9340) and how does it work?

A slotted nut (also called a sleeve nut) has an internally metric threaded cylindrical sleeve and a flange with a slot drive. It is mounted through a pre-drilled hole in the workpiece, where it meets a through-going machine screw from the opposite side. The result is a very strong and reusable joint that clamps the material together without protruding nut edges.

What is the advantage of an oval countersunk head for panel and wood fastening?

The oval countersunk geometry provides both functional and aesthetic benefits:

• Flush and safe surface: The countersink allows the nut to sit flush with the material so that no sharp edges protrude where clothing, equipment, or hands could get caught.

• Even pressure distribution: The collar/flange distributes the clamping force over a larger area, which prevents the nut from being pulled through softer materials like wood, plastic, or composite.

• Clean surface finish: The oval head provides an elegant, professional, and clean finish for visible mountings.

Why is stainless steel A2 (AISI 304) suitable for slotted nuts and when should it be used?

Stainless steel A2 (1.4301 / AISI 304) provides excellent corrosion protection in indoor environments, damp areas, and normal outdoor environments without direct contact with salt water or acids. This makes the slotted nut ideal for:

• Carpentry & interior design: Stair railings, door fittings, furniture assembly, and wooden structures.

• Facades & sign mounting: Concealed and flush fastenings in outdoor panel materials.

• Vehicles & equipment: Mounting panels and linings where the back side requires a smooth metric thread.