Clamping Elements

What does the clamping accessories category include?

Clamping accessories are mechanical fastening components used for stabilizing, holding, and precisely supporting parts in machining, molds, automation, or industrial clamping processes. They are suitable for precise and demanding work environments where strong, reliable, and repetitive fastening is required.

What is the difference between a T-nut, a flange nut, and a regular nut?

A T-nut (according to DIN 508 standard) is designed for direct insertion into T-slots of work tables, rails, or fixtures. It allows for quick clamping without drilling.
A flange nut (DIN 6331) includes a lower "flange" that prevents it from rotating – useful in permanent assemblies. A regular nut (e.g., DIN 6330B) lacks the flange and is intended for standard connections.

How to choose a suitable clamping arm?

A clamping arm is a clamping lever that stabilizes a component against a work table or surface. Variations include:

  • Straight clamping arm – suitable for general and quick clamping.
  • Clamping arm with stepped support (S280) – allows clamping of items with varying heights.
  • Curved / low profile clamping arm – for delicate items or limited connections.

The choice should be made according to the item's height, base height, and type of weight/load.

What are the functions of serrated supports and support feet?

Serrated supports (S110) stabilize parts from below or the side, and feature serrated surfaces for secure gripping. Magnetic or aluminum support feet (S120–S122) allow for temporary or permanent fastening as needed, with adjustable height. Especially suitable for working on individual parts, CNC items, or dedicated machines.

DIN standards table for clamping accessories
Component DIN Standard Number Description
T-nut DIN 508 Square nut for sliding into T-slot
Flange nut DIN 6331 Nut with raised base to prevent rotation
Regular nut DIN 6330B Round nut without base – for general assemblies
Threaded pin DIN 6379 Double-threaded pin for precise fastening

All standards are based on industrial precision requirements and are recommended for professional use according to the type of load and project.

How to choose a clamping accessory based on load or clamping force?

Clamping force is the force exerted by the clamping accessory on the clamped component. It depends on the bolt diameter, tightening torque, and friction, and is measured in Newton (N) or kilogram-force (kgf).

Typical values by accessory type:

  • M6 T-nut – up to 10 kgf
  • M12 flange nut – around 40 kgf
  • Stepped clamping arm – 100–200 kgf (depending on handle and bolt)

Guidelines for correct selection:

  • Do not exceed 80% of the maximum recommended force for each component
  • In precise systems, it is recommended to use a torque wrench
  • In applications with vibration or variable load, hardened clamping accessories should be preferred