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Concept Layer

Fastener Knowledge

The concept layer for this library: what a bolt is, how a fastener standard works, what metric designation means, and how a material is chosen. Each guide links onward into the engineering data for the specific standards.

What this layer is

This is the concept layer. It explains the ideas behind the parts — what a bolt is, how a fastener standard works, what metric designation means, how a material is chosen. It does not duplicate dimensional data.

LayerAnswersWhere it lives
ConceptWhat is this, which type, why this materialThis section — /knowledge/
Standard dataDimensions, tolerances, sizes for one standard/library/
Cross-referenceHow DIN, ISO and ASME standards align/engineering-center/
Strength dataProperty classes, proof stress, hardness/mechanical-properties/
Coating dataCoating thickness, salt spray, temperature limits/surface-treatment/
CommercialProduct presentation, 3D model, OEM capability/products/
Every page in this layer links onward into the engineering data above. Nothing here replaces or overrides it.

Topic guides

Six concept guides, each backed by real standards in this library.

Topic

Fastener Standards

What a standard fixes, what a standard number encodes, and how DIN, ISO and ASME relate.

 Topic

Bolts

What a bolt is, how it differs from a screw, and the bolt types this library covers.

 Topic

Metric Fasteners

M-designation, metric coarse thread, the 12 metric standards and their DIN / ISO equivalents.

 Topic

Fastener Materials

Carbon, alloy and stainless steel, heat-resistant grades, and how to pair a material with a coating.

 Topic

High-Temperature Fasteners

Hot-service joints, the material routes, and the grade designations behind heat resistant bolts.

 Topic

Weathering Steel

Atmospheric-corrosion-resistant steel, the patina mechanism, and the designations behind Corten.

Engineering data roots

The five engineering data sections this concept layer navigates into.

Data

Standards Library

16 standards with full dimensional matrices and size navigators.

 Commercial

Product Range

Product presentation by standard, with 3D models and OEM capability.

 Cross-reference

Engineering Center

DIN / ISO / ASME alignment matrix and field risk notes.

 Data

Mechanical Properties

Bolt property classes 4.6 to 12.9, nut classes 04 to 12, washer hardness 100HV to 300HV.

 Data

Surface Treatment

Zinc, hot-dip galvanizing, zinc flake, black oxide, phosphate and passivation.

How the layers connect

  1. Concept — start here when you know the job but not the standard.
  2. Standard — /library/ maps the standard number to a data page.
  3. Size — each standard page opens a size navigator (for example DIN 933 M14).
  4. Engineering detail — each standard also carries a materials, mechanics and surface compatibility page at /library/{standard}/b3/.
  5. Commercial — /products/ presents the same standards as orderable product families.

Where to start

If you need toGo to
Identify which standard fits a hexagon head boltBolts
Understand why DIN 933 and ISO 4017 are interchangeableFastener Standards
Check what metric designation and size meanMetric Fasteners
Decide between carbon steel, alloy steel and stainlessFastener Materials