Gloved hands tightening a hex bolt with a socket wrench on a rusted assembly fixture

Engineering specification database

Every fastener spec, one lookup away.

Dimension tables for screws, bolts, nuts and washers across DIN, ISO and ANSI/ASME — with thread geometry, property classes and cross-standard equivalence, all in one structured dataset.

Illustrative photograph · torque-controlled tightening

31Standards

1,929Specification pages

82Thread designations

8Materials

12Property classes

Dimensioned drawingseach specification page is drawn from its own dimension row

DIN 912 M6 × 30

DIN 912 M6 × 30 — Socket head (cylindrical)Nominal dimensions in mm · Not to scale

The numbers on that drawing

StandardDIN 912

ThreadM6 × 1 mm

Length L30 mm

Head Ø dk10 mm

Head height k6 mm

Socket s5 mm

Thread length b24 mm

1,929 specification pages carry a drawing generated from their own nominal dimensions — head diameter, head height, socket size, thread length and overall length — so the figure and the table always agree.

Gloved hands running a pneumatic torque wrench along a row of bolts on an assembly frame — Torque-controlled tightening — driven to a specified value, not to feel

Gloved hands measuring a bolt shank with a vernier caliper — Dimensional check — the numbers on the drawing, measured back

Workshop storage bins holding sorted hex bolts, nuts and washers — Sorted by size and grade — the catalogue, as it is stored

Browse by fastener type

All categories

boltsDIN 933, ISO 4017, DIN 931, ISO 40144 std · 454 specs nutsDIN 934, ISO 4032, DIN 439, ISO 40357 std · 86 specs screwsDIN 912, ISO 4762, DIN 7991, ISO 1064217 std · 1,352 specs washersISO 7089, DIN 125 A, DIN 1273 std · 37 specs

Specification pagesone page per standard × diameter × length

Browse by size

DIN 912M6 × 30Socket head (cylindrical)P 1 ISO 4762M8 × 40Socket head (cylindrical)P 1 DIN 933M10 × 50Hexagon headP 1.25 DIN 934M8—P 1 DIN 985M6—P 1 DIN 7991M8 × 20Countersunk head (90°)P 1 ISO 4017M8 × 30Hexagon headP 1 ISO 4032M10—P 1.25 DIN 931M8 × 40Hexagon headP 1 ISO 4014M6 × 30Hexagon headP 1 ISO 7089M10—P 1.25

1,929 pages in total — each carrying its own dimension row rather than repeating one article.

Standardsdimension tables by issuing body

All 31 standards

DIN 912Hexagon Socket Head Cap Screw15 sizes ISO 4762Hexagon Socket Head Cap Screw15 sizes DIN 933Hexagon Head Screw / Bolt — Full Thread12 sizes ISO 4017Hexagon Head Screw — Full Thread, Product Grade A/B12 sizes DIN 934Hexagon Full Nut15 sizes ISO 4032Hexagon Regular Nut, Style 115 sizes DIN 931Hexagon Head Bolt — Partial Thread12 sizes ISO 4014Hexagon Head Bolt — Partial Thread, Product Grade A/B12 sizes DIN 7991Hexagon Socket Countersunk Head Screw11 sizes ISO 7380Hexagon Socket Button Head Screw8 sizes DIN 985Prevailing Torque Hexagon Nut with Nylon Insert12 sizes ISO 7089Flat Washer — Normal Series, 200 HV13 sizes

DIN

DIN 912 DIN 7991 DIN 7984 DIN 933 DIN 931 DIN 934 DIN 439 DIN 985 DIN 125 A DIN 127 DIN 916 DIN 914 DIN 915 DIN 913 DIN 84 DIN 85 DIN 963

ISO

ISO 4762 ISO 10642 ISO 7380 ISO 4017 ISO 4014 ISO 4032 ISO 4035 ISO 10511 ISO 4161 ISO 7089 ISO 4029 ISO 1207 ISO 1580 ISO 2009

Thread systemspitch, diameters and tap drill sizes

All threads

METRICISO metric M profile, coarse and fine37 designations UNCUNC unified inch profile25 designations UNFUNF unified inch profile20 designations

Cross-standard referencewhat actually differs, field by field

All comparisons

DIN 912 vs ISO 4762 DIN 7991 vs ISO 10642 DIN 933 vs ISO 4017 DIN 931 vs ISO 4014 DIN 934 vs ISO 4032 DIN 439 vs ISO 4035 DIN 985 vs ISO 10511 ISO 7089 vs DIN 125 A DIN 916 vs ISO 4029 DIN 84 vs ISO 1207 DIN 85 vs ISO 1580 DIN 963 vs ISO 2009

Materials & property classes

MaterialsSteels, stainless and non-ferrous, with typical mechanical properties and common applications8 entries GradesProperty classes 4.8 through 12.9 plus A2/A4 stainless, with tensile and yield data12 entries

Every page here is generated from a structured specification database — each standard and size combination carries its own dimension row rather than repeating a single article. Nominal values are compiled from published standards; verify against the current revision before ordering.