Phase 1 — reference & identification only. No shop, no accounts.
DigipichFASTENER KB
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ABOUT US

The fastener reference
for industry.

We are DigiPich — a reference for industry that makes it easy for anyone who needs to find a bolt, screw, nut, washer, pin or retaining ring. Type the number from a drawing, a stock list or a supplier's quote and get the part's standard, its dimensions and what replaced it — in English, German or Persian.

ONE PART · MANY NAMES
ISO 4017 – M10 × 30 – 8.8
Replaces
DIN 933
Europe
EN ISO 4017
Deutsch
Sechskantschraube
فارسی
پیچ شش‌گوش تمام‌رزوه
385standards · 293 DIN, 92 ISO
4 262sizes with dimensions
10fastener categories
3languages · EN, DE, فارسی
Why we exist

Small parts, scattered information.

Fasteners are the most common parts in any machine, and some of the most misunderstood. The same hex screw is called DIN 933, ISO 4017, EN ISO 4017, UNI 5739 or simply "full-thread hex bolt". Its data is spread across paid standards, supplier catalogues and forum posts, usually in one language.

Since the 1990s, most DIN fastener standards have been withdrawn and replaced by ISO standards, adopted in Europe as EN ISO. Drawings, stock lists and purchase orders still use the old DIN numbers every day. The replacement is not always one-to-one: ISO 4017 changed the width across flats for M10, M12, M14 and M22, so a spanner that fits the DIN part may not fit the ISO one.

DigiPich puts this in one place. Every standard gets a permanent page with its dimensions, status, successor and sources, so an engineer, a storekeeper and a buyer are talking about the same part.

What you'll find here

Reference and identification only. No shop, no accounts.
01
Standard pages
One page for every DIN and ISO standard: title, product type, status and what it replaced or was replaced by.
02
Dimension tables
Values for each nominal size as the standard gives them (nominal, min–max, ≤ / ≥), with product grade A/B, type and series variants.
03
DIN ↔ ISO cross-reference
Which ISO standard replaced a DIN, the national equivalents, and where the "equivalent" parts actually differ.
04
Thread data
ISO 261 / 262 metric coarse and fine pitches with pitch diameter, minor diameter, tap drill and tensile stress area.
05
Property classes & materials
Steel bolt classes 4.6 to 12.9 (ISO 898-1), nut classes (ISO 898-2) and stainless A2 / A4 grades (ISO 3506).
06
Glossary
Pitch, width across flats, product grade, prevailing torque and more, explained in plain words in every language.
Engineering notes

Three things we help you get right

1 · Reading a designation

ISO 4017–M10× 30–8.8
ISO 4017The standard: hexagon head screw, threaded to the head.
M10Metric thread, 10 mm nominal diameter. Coarse pitch (1.5 mm) unless a pitch is written, e.g. M10 × 1.25.
× 30Nominal length in mm, measured from under the head (overall length for countersunk heads).
8.8Property class: 800 MPa nominal tensile strength, yield at 0.8 × that, about 640 MPa.

2 · "Equivalent" is not "identical"

When ISO replaced DIN, four hex sizes got a different width across flats (s). Same thread, different spanner:

Threads · DIN 933s · ISO 4017
M101716
M121918
M142221
M223234

mm. Every replaced-standard page lists its differences like this.

3 · Match the bolt and the nut

8.8 → 8general engineering
10.9 → 10high-strength joints
12.9 → 12socket cap screws
A4-80 → A4-80stainless, marine / chloride

Per ISO 898-2, a nut must have the same class as the bolt or higher, so the bolt breaks before the nut threads strip. A2 stainless suits most indoor and outdoor use; choose A4 (with molybdenum) near salt water or chlorides.

Who it's for

Everyone who specifies, fits or buys a fastener.

Design engineers
Pick the current standard and check dimensions for clearance and fit.
Maintenance technicians
Identify the part in your hand and find its replacement.
Buyers & procurement
Turn an old DIN number into the ISO one suppliers quote today.
Stores & warehouse
Merge duplicate stock items that are really the same part.
Distributors & importers
Match customer requests across languages and national standards.
Students & trainees
Learn the vocabulary: pitch, grade, class, drive, point.
How we handle data

Trust is part of the page.

Draft
Values taken from a single named source and not yet cross-checked.
✓ Reviewed
Dimensions cross-checked against the official ISO preview, and the values match.
✓ Verified
Signed off by a human expert against the standard itself.
Every value has a source. Each page names where its numbers came from: the fasteners.eu norm directory, official ISO previews, manufacturer data and ISO 261/262 thread tables.
Values as the standard states them. No rounding, unit conversion or interpolation. Ranges read min–max; single limits use ≤ or ≥.
Withdrawn stays online. A replaced DIN keeps its page, with its status and successor, because it is still on drawings.

What we are not

Not a shop. No prices, orders or accounts, just reference and identification.
Not affiliated with DIN, ISO or CEN. We don't publish standard texts or scanned tables. We present facts in our own words and link to the publishers.
Not a substitute for the standard. For design, safety-critical or legal use, consult the current edition from the publisher.

Found a wrong value? Know a missing standard?

Send corrections, part photos or national equivalents. Please include the source: the standard edition, a manufacturer datasheet or a technical handbook.

info@digipich.com