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Spårmuttrar DIN 546 i syrafast A4 rostfritt stål i olika storlekar för korrosionsbeständiga och säkra skruvförband.
Teknisk måttritning och dimensionstabell för spårmuttrar DIN 546 i syrafast A4 rostfritt stål med metriska dimensioner.
Spårmuttrar DIN 546 i syrafast A4 rostfritt stål i olika storlekar för korrosionsbeständiga och säkra skruvförband.
Spårmuttrar DIN 546 i syrafast A4 rostfritt stål i olika storlekar för korrosionsbeständiga och säkra skruvförband.
Teknisk måttritning och dimensionstabell för spårmuttrar DIN 546 i syrafast A4 rostfritt stål med metriska dimensioner.
Spårmuttrar DIN 546 i syrafast A4 rostfritt stål i olika storlekar för korrosionsbeständiga och säkra skruvförband.

Slotted nut | A4 | DIN 546

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SKU: 101952
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Description

If you are looking for a low-profile nut that enables secure locking in demanding environments without rusting, the slotted nut DIN 546 in A4 stainless steel is a reliable choice. It is manufactured from acid-proof A4 / AISI 316 stainless steel and can withstand moisture, salt, chemicals, and temperature fluctuations. With its compact format and slotted top, it is particularly useful where space is limited and a vibration-proof connection is required.

FIELD OF APPLICATION

The DIN 546 slotted nut is primarily used as a locknut in marine environments, chemical plants, food production, and other applications where both space and corrosion protection are crucial. It is easily installed with a slotted screwdriver and is suitable for securing shafts, bearings, and machine parts. Thanks to the stainless material, it requires minimal maintenance and has a long service life.

TECHNICAL SPECIFICATIONS

• Product type: Slotted nut
• Standard: DIN 546
• Quality: A4 / AISI 316
• Material class: A4-70
• Thread type: Metric
• Surface finish: Untreated (natural stainless steel)
• Head shape: Round with slot
• Grip type: Slot for flat-head screwdriver

FREQUENTLY ASKED QUESTIONS (FAQ)

What is a slotted nut (DIN 546) and when is it used instead of a standard hexagonal nut?

DIN 546 is a round, low-profile nut equipped with a through-slot in the top. Unlike a standard hexagonal nut, it has no external wrench flats and is tightened flush or flat against the surface using a flat-head screwdriver or a specialized slotted nut wrench. It is mainly used in applications where:

  • Space is limited: The round profile takes up minimal radial space.

  • Flush mounting is required: The nut can be fully recessed into circular holes to avoid protruding edges.

  • Fine mechanics & electronics: Often used in panels, instrumentation, precision controls, and optical devices.

How is a DIN 546 slotted nut tightened securely?

For smaller dimensions and low tightening torques, a wide, properly fitting flat-head screwdriver can be used. For higher tightening requirements or when the nut is recessed, a specialized wrench (slotted nut wrench) that fits exactly into the slot is recommended. This prevents the tool from slipping and damaging the slot or the surrounding surface.

Why is acid-proof A4 / AISI 316 essential for slotted nuts in outdoor and marine environments?

Threaded components with small dimensions and fine slots are especially sensitive to crevice corrosion and oxidation. Acid-proof A4 steel (AISI 316 / 1.4401) is alloyed with molybdenum, which provides complete protection against pitting and saltwater corrosion. This ensures that the slotted nut does not rust stuck or lose its thread strength, which facilitates future maintenance and disassembly in demanding environments.