Standards library.

The standards that fastener, scaffolding and certificate specifications name, grouped by what they control. Quote the standard your drawing names; where an ISO standard replaced a DIN one, both are listed.

Reviewed 11 Nov 2026 · Based on the standards listed (titles shortened) · Report an error

Questions on this?

Threads

  • ISO 261Metric screw threads: sizes and pitchesCoarse and fine pitch for each diameter · Open tool
  • ISO 724Metric threads: basic dimensionsPitch and minor diameters · Open tool
  • ASME B1.1Unified inch threads (UNC, UNF)Threads per inch for inch fasteners · Open tool
  • ISO 273Clearance holes for bolts and screwsFine, medium and coarse hole sizes · Open tool

Strength and materials

  • ISO 898-1Carbon and alloy steel bolts, screws and studsProperty classes 4.6 to 12.9, proof loads · Open tool
  • ISO 898-2Carbon and alloy steel nutsNut property classes, such as 8 and 10, to pair with bolts
  • ISO 3506-1Stainless steel bolts, screws and studsA2 and A4 grades and their property classes · Open tool
  • SAE J429Inch bolts, grades such as 2, 5 and 8US grade markings and strengths · Open tool
  • ASTM A193Alloy and stainless bolting for high-temperature or pressure serviceGrade B7 studs and threaded rod · Open tool

Products

  • ISO 4014 / DIN 931Hexagon head bolts, part threadBolt dimensions; across flats differ for M10, M12, M14, M22 · Open tool
  • ISO 4017 / DIN 933Hexagon head screws, full threadScrew dimensions · Open tool
  • ISO 4032 / DIN 934Hexagon nutsNut height and across flats · Open tool
  • ISO 4762 / DIN 912Hexagon socket head cap screwsSocket screw dimensions · Open tool
  • ISO 7089 / DIN 125-APlain washers, normal seriesWasher inner and outer diameter, thickness · Open tool
  • ISO 7090Plain washers, chamferedAs ISO 7089, with a chamfered edge
  • DIN 975 / DIN 976-1Threaded rodMetric rod; there is no ISO product standard · Open tool

Coatings

  • ISO 4042Electroplated coatings on fastenersZinc plating; hydrogen-embrittlement control for high classes
  • ISO 10684Hot-dip galvanized coatings on fastenersGalvanizing and oversize-tapped nuts

Scaffolding

  • EN 74-1Couplers for tube-and-fitting scaffoldsCoupler types, classes and tests
  • BS 1139Metal scaffolding (UK)Tubes and fittings named on UK specifications

Documents and shipping

  • EN 10204Inspection documents for metallic productsCertificate types 2.1, 2.2, 3.1 and 3.2 · Open tool
  • Incoterms 2020ICC delivery termsWho pays and carries risk, from EXW to DDP

Reference values, not a design.

Values are the nominal figures of the cited standards, or calculated from them where marked. The governing standard and your drawing always take precedence.

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Questions buyers ask.

Is DIN 933 the same as ISO 4017?

They describe the same full-thread hexagon screw. The thread and classes match, but across flats differ for M10, M12, M14 and M22, so state which standard your drawing uses.

Is there an ISO standard for threaded rod?

No ISO product standard covers threaded rod. Metric rod is ordered to DIN 975 or DIN 976-1 with a property class; inch rod is ordered by material specification such as ASTM A193 B7.

Which standard covers inspection certificates?

EN 10204 defines the inspection document types 2.1, 2.2, 3.1 and 3.2. Agree the type in the order.

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