DIN 13 is a withdrawn DIN document that published theoretical (basic) values for metric screw threads from 1 mm to 68 mm nominal diameter.
It is typically referenced for legacy drawings and documentation where thread geometry or basic dimensions must be interpreted consistently before any inspection plan, gauging approach, or part acceptance criteria can be aligned. If you are working from an older print package, you can talk with our team about practical options for thread verification and measurement in your lab or QA workflow.
DIN 13: Metric screw threads from 1 mm to 68 mm diameter — theoretical values
DIN 13:1943-09 is a short, legacy DIN publication focused on theoretical values for metric screw threads in the 1 mm to 68 mm nominal diameter range.
This document is marked as withdrawn and is most relevant when a contract, drawing, or internal specification explicitly cites “DIN 13” rather than later DIN 13 parts or ISO-thread standards.
Quick Definition
Document type: Legacy dimensional reference (theoretical thread values), not a standalone mechanical test method.
What it helps define: Basic thread geometry/dimensions used to interpret or check metric screw threads in the stated size range.
Status note: DIN 13:1943-09 is withdrawn and was replaced by later DIN 13-series documents.
What This Standard Covers
DIN 13 covers theoretical values for metric screw threads with nominal diameters from 1 mm to 68 mm.
Because this is a theoretical-values reference, it is commonly used to support dimensional interpretation and inspection planning rather than defining a complete “test procedure” with loading, rates, conditioning, or material-property calculations.
Why This Standard Matters in Testing
Threaded joints are often acceptance-critical features in mechanical assemblies. When a legacy drawing calls out DIN 13, inspection teams may need a consistent reference point for what the thread geometry is intended to be before choosing gauges or measurement methods.
In practice, this affects whether you can verify threads using attribute gauging (GO/NO-GO) versus variable measurement (dimensional measurement of thread features), and how you document inspection results for traceability.
Common Materials, Product Types, or Applications Covered
DIN 13 is associated with metric threaded components and mating parts where thread form and dimensions must be controlled.
Common examples: Screws, bolts, studs, nuts, tapped holes, threaded inserts, and threaded mechanical features on machined parts.
Common Test or Verification Workflow
DIN 13 is most often used as a cited reference during dimensional verification of threads on incoming parts, in-process manufacturing checks, or final inspection.
Common workflows: Confirm the exact drawing callout and edition reference; select an inspection approach (gauging vs. measurement); verify threads on parts and record results in an inspection report aligned to the purchase order and drawing requirements.
Practical caution: Because DIN 13 is withdrawn and has been replaced by later DIN 13-series documents, inspection plans should be tied to the exact designation shown on the drawing or customer requirement to avoid mixing legacy and newer references.
Equipment Commonly Used for This Standard
DIN 13 influences thread inspection equipment selection more than it dictates a single mandatory setup. Equipment is usually chosen based on whether you need fast attribute checks, detailed measurement, or both.
Common equipment: GO/NO-GO thread plug gauges and ring gauges; thread micrometers; optical comparators or vision measuring systems for thread profile checks; CMMs or other metrology systems for dimensional verification where appropriate; calibrated reference standards as needed for traceability.
If you are specifying a new inspection station or upgrading a QA lab for threaded parts, you can request pricing for a configuration matched to your inspection throughput and documentation needs.
How to Read This Designation or Revision
Typical designation: DIN 13:1943-09.
Meaning: “DIN 13” is the document identifier and “1943-09” is the publication date (September 1943).
Revision sensitivity: Because DIN 13 is withdrawn and has been replaced by later DIN 13-series publications, always align procurement, inspection, and reporting to the exact standard designation shown in the governing requirement (drawing, contract, or customer specification).
Related Standards, Methods, or Frameworks when useful
DIN 13 is part of a broader DIN 13-series history related to ISO metric screw threads, and it has been replaced by later DIN 13-series documents.
When a requirement references ISO metric threads instead of DIN 13 directly, thread verification may also involve thread gauging standards and tolerance/designation standards that are separate from this withdrawn DIN 13 document.
Request help selecting an inspection approach
If you need to translate a DIN 13 drawing callout into an inspection plan (gauges vs. variable measurement, sampling, and reporting), contact our team with your part size range, thread callouts, and throughput targets.