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Låga sexkantsmuttrar DIN 439 B i rostfritt A2-stål med fasade kanter för säkra och stabila skruvförband.
Teknisk måttritning och dimensionstabell för låga sexkantsmuttrar DIN 439 B i rostfritt A2-stål.
Låga sexkantsmuttrar DIN 439 B i rostfritt A2/A4-stål med fasade kanter för säkra och stabila skruvförband.
Låga sexkantsmuttrar DIN 439 B i rostfritt A2-stål med fasade kanter för säkra och stabila skruvförband.
Teknisk måttritning och dimensionstabell för låga sexkantsmuttrar DIN 439 B i rostfritt A2-stål.
Låga sexkantsmuttrar DIN 439 B i rostfritt A2/A4-stål med fasade kanter för säkra och stabila skruvförband.

Hexagon nut thin | A2 | DIN 439

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Description

If you are looking for a thin hexagon nut that can handle direct locking of bolted joints in demanding environments without rusting, the thin hexagon nut DIN 439 B in stainless steel is a reliable choice. It is manufactured from A2 / AISI 304 stainless steel and designed to withstand moisture, moderate salinity, chemicals, and temperature fluctuations. The nut features a low profile according to DIN 439 B and is used where there is limited installation space but a durable and corrosion-resistant fastening is still required – particularly in industrial, construction, or outdoor environments.

FIELD OF APPLICATION

The thin hexagon nut DIN 439 B is intended for locking bolted joints in, for example, control cabinets, machine assemblies, building structures, or lighter installations in environments such as wet rooms, public spaces, or workshops. The metric thread enables secure and vibration-resistant locking without the need for additional locking hardware. The product is easily installed with a standard socket or open-ended wrench. The nut can be used on flat metal or plastic surfaces and is often combined with lock washers or a counter-nut. It requires minimal maintenance and offers good corrosion resistance in most environments, except for the most aggressive ones.

TECHNICAL SPECIFICATIONS

Product type: Thin hexagon nut
Standard: DIN 439 B
Quality: A2 / AISI 304
Material class: A2-70
Thread type: Metric
Surface finish: Untreated (natural stainless steel)
Head shape: Hexagonal
Grip type: External hexagon

FREQUENTLY ASKED QUESTIONS (FAQ)

What does it mean that the nut has a low profile according to DIN 439 B?

DIN 439 B (substantially equivalent to ISO 4035) specifies the standard for a thin hexagon nut with chamfered edges (Form B):

  • Compact assembly height: The nut has approximately half the height of a standard nut (DIN 934). This makes it ideal for tight spaces where the thread protrusion is short or where lateral/depth space is limited.

  • Chamfered edges (Form B): The chamfer on the outer corners of the nut provides a cleaner finish, prevents the nut from catching on adjacent moving parts, and facilitates tool engagement when tightening.

When should you use a thin hexagon nut instead of a standard nut?

Thin hexagon nuts are primarily used in three specific cases:

  1. Tight spaces: Where a standard nut is simply too thick to fit.

  2. Counter-nut (Jam nut): Often used together with a standard nut on the same bolt. The thin nut is tightened against the standard nut to create a mechanically locked joint that prevents the screw from backing out due to vibrations.

  3. Adjustment and end stops: Suitable as an adjustable stop on threaded rods, rod ends, and pivot bolts where the nut is only subjected to minor axial loads.

Why is stainless steel A2 (AISI 304) suitable for these applications?

A2 steel (1.4301 / AISI 304) provides reliable and long-lasting corrosion protection for most industrial and outdoor environments:

  • Moisture and weather resistant: Withstands continuous exposure to outdoor climates, rain, snow, and humidity without the risk of surface rust.

  • Chemical & Hygienic resistance: Withstands washdowns, detergents, and mild chemicals, making it popular in machine designs, ventilation systems, and enclosures.

  • Prevents seizing during correct installation: When assembling against a stainless steel screw, it is recommended to tighten with controlled torque (and optionally use assembly paste/lubricant for stainless steel) to prevent the threads from seizing (galling).