Gloved hands tightening a hex bolt with a socket wrench on a rusted assembly fixture
PartXT — Engineering Database

Search any part, material or standard.

Dimension tables for screws, bolts, nuts and washers across DIN, ISO and ANSI/ASME — alongside material data, thread geometry, property classes and cross-standard equivalence. One database, structured so every answer traces back to a published standard.

Ctrl K
Illustrative photograph · torque-controlled tightening
39Standards
2,273Specification pages
82Thread designations
36Materials
12Property classes

Browse by pillarfive ways in — a part, a material, a standard, a tool, an explanation

PartXTPartsComponent families, dimensioned from their own published standards.PartXTMaterialsDensity, corrosion behaviour and the grades each is supplied in.PartXTStandardsDimension tables by issuing body, with cross-standard equivalence.PartXTToolsCalculators and lookups that turn the data into an answer.PartXTGuidesThe reasoning behind the numbers, when the answer needs explaining.

Dimensioned drawingseach specification page is drawn from its own dimension row

DIN 912 M6 × 30
Dimensioned drawing — DIN 912 M6 × 30k 6L 30⌀10⌀6
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

2,273 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 40145 std · 514 specsnutsDIN 934, ISO 4032, DIN 439, ISO 40359 std · 102 specsscrewsDIN 912, ISO 4762, DIN 7991, ISO 1064221 std · 1,614 specswashersISO 7089, DIN 125 A, DIN 127, ASME B18.22.14 std · 43 specs

Specification pagesone page per standard × diameter × length

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

2,273 pages in total — each carrying its own dimension row rather than repeating one article.

Standardsdimension tables by issuing body

All 39 standards
DIN 912Hexagon Socket Head Cap Screw15 sizesISO 4762Hexagon Socket Head Cap Screw15 sizesDIN 933Hexagon Head Screw / Bolt — Full Thread12 sizesISO 4017Hexagon Head Screw — Full Thread, Product Grade A/B12 sizesDIN 934Hexagon Full Nut15 sizesISO 4032Hexagon Regular Nut, Style 115 sizesDIN 931Hexagon Head Bolt — Partial Thread12 sizesISO 4014Hexagon Head Bolt — Partial Thread, Product Grade A/B12 sizesDIN 7991Hexagon Socket Countersunk Head Screw11 sizesISO 7380Hexagon Socket Button Head Screw8 sizesDIN 985Prevailing Torque Hexagon Nut with Nylon Insert12 sizesISO 7089Flat Washer — Normal Series, 200 HV13 sizes
DIN
DIN 912DIN 7991DIN 7984DIN 933DIN 931DIN 934DIN 439DIN 985DIN 6923DIN 125 ADIN 127DIN 916DIN 914DIN 915DIN 913DIN 84DIN 85DIN 963
ISO
ISO 4762ISO 10642ISO 7380ISO 4017ISO 4014ISO 4032ISO 4035ISO 10511ISO 4161ISO 7089ISO 4029ISO 4027ISO 4028ISO 4026ISO 1207ISO 1580ISO 2009

Thread systemspitch, diameters and tap drill sizes

All threads
METRICISO metric M profile, coarse and fine37 designationsUNCUNC unified inch profile25 designationsUNFUNF unified inch profile20 designations

Cross-standard referencewhat actually differs, field by field

All comparisons
DIN 912 vs ISO 4762DIN 7991 vs ISO 10642DIN 933 vs ISO 4017DIN 931 vs ISO 4014DIN 934 vs ISO 4032DIN 439 vs ISO 4035DIN 985 vs ISO 10511ISO 4161 vs DIN 6923ISO 7089 vs DIN 125 ADIN 916 vs ISO 4029DIN 914 vs ISO 4027DIN 915 vs ISO 4028DIN 913 vs ISO 4026DIN 84 vs ISO 1207DIN 85 vs ISO 1580DIN 963 vs ISO 2009ASME B18.2.1 vs DIN 933ASME B18.3 vs DIN 912ASME B18.2.2 vs DIN 934ASME B18.22.1 vs ISO 7089

Materials, tools and referencewhat sits alongside the fastener tables

MaterialsMetals, plastics and wood — density, corrosion behaviour and typical grades36 entriesWeight calculatorMass of a bar, plate or tube from its section and material, with the arithmetic shownToolThread identifierMeasure a thread and get the designation back — for parts with no markings leftToolProperty classesClasses 4.8 through 12.9 plus A2/A4 stainless, with tensile and yield data12 entriesGuidesHow equivalence actually works, how grade and material interact, and where substitutions go wrongRead
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.