Home » All products » Carriage bolt | A2 | DIN 603
Vagnsbultar i rostfritt A2-stål med rund skalle och fyrkantshals för säker och hållbar infästning i trä och andra konstruktioner.
Teknisk måttritning och dimensionstabell för vagnsbultar DIN 603 i rostfritt A2-stål, storlek M5–M16.
Vagnsbultar i rostfritt A2/A4-stål med rund skalle och fyrkantshals för säker och hållbar infästning i trä och andra konstruktioner.
Vagnsbultar i rostfritt A2-stål med rund skalle och fyrkantshals för säker och hållbar infästning i trä och andra konstruktioner.
Teknisk måttritning och dimensionstabell för vagnsbultar DIN 603 i rostfritt A2-stål, storlek M5–M16.
Vagnsbultar i rostfritt A2/A4-stål med rund skalle och fyrkantshals för säker och hållbar infästning i trä och andra konstruktioner.

Carriage bolt | A2 | DIN 603

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SKU: 101075
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Description

Do you need a carriage bolt that provides a reliable assembly even in damp or outdoor environments? The carriage bolt DIN 603 A2 in A2 / AISI 304 stainless steel offers good corrosion resistance and a long service life under normal weather exposure. The round, smooth head with a square neck underneath provides a secure grip in wood and prevents the bolt from rotating during tightening. The A2 grade provides an optimal balance between strength and rust resistance for most construction, interior, and assembly work.

AREA OF USE

Perfect for fastening in wood, metal fittings, fences, outdoor furniture, and structures in outdoor environments, gardens, construction projects, and general assembly. The square neck under the head locks the bolt against the surface and provides a stable and vibration-resistant connection without the need to hold it with tools. Easily assembled with a nut and washer and requires minimal maintenance.

TECHNICAL SPECIFICATIONS

Product type: Carriage bolt
Standard: DIN 603
Grade: A2 / AISI 304 stainless steel
Material class: A2-70
Thread type: Metric (ISO thread)
Surface finish: Untreated (natural colored stainless steel)
Head shape: Round domed head with square neck
Grip type: Not applicable

FREQUENTLY ASKED QUESTIONS (FAQ)

How does a carriage bolt (DIN 603) work and what makes it suitable for wooden structures?

A carriage bolt has two unique design features that make it ideal for fastening in wood, fences, and wooden structures:

  • Square neck under the head: When the bolt is tapped or pulled into a pre-drilled hole in the wood, the square neck locks into the material. This prevents the bolt from rotating when you tighten the nut from the back.

  • Smooth, domed head: The rounded head lacks grooves or a hex profile. This provides a very aesthetic and sleek finish while also acting as a theft and vandalism deterrent – the bolt cannot be unscrewed from the outside without tools.

Why choose stainless steel A2 (AISI 304) for outdoor assembly?

Stainless steel A2 (1.4301 / AISI 304) is the standard choice for all types of outdoor construction exposed to the elements:

  • Resistant to rain and moisture: Withstands direct exposure to rain, snow, and changing temperatures without suffering from rust stains or structural weakening (Corrosivity class C3).

  • Good balance between price and performance: For standard wooden decks, fences, carports, and wooden facades, A2 provides adequate and long-lasting protection.

  • When is A4 needed instead? If the structure is assembled directly at the coast, in contact with salt water, or near pools with chlorinated environments, you should choose acid-proof A4 steel to prevent crevice corrosion under the tight bolt head.

What should one consider when installing an A2 carriage bolt in wood?

  1. Correct hole diameter: Pre-drill the wood with the same diameter as the bolt's thread. The square neck should be pressed/tapped into the wood with a plastic mallet so as not to damage the head.

  2. Use a fender washer (DIN 9021): Since wood is a soft material, you should always use a wide fender washer under the nut on the back. It distributes the clamping force over a larger area so that the nut is not pulled into the wood fibers.