DIN 933Hexagon headExternal hexagon

DIN 933 M10 × 20 Hexagon head

DIN 933 M10 × 20 is a hexagon head bolt with a 20 mm nominal length, on a M10 × 1.25 mm metric thread. A hexagon head fastener threaded all the way to the head. Glyph marking on the head identifies the property class, normally 8.8, 10.9 or A2-70.

Dimensioned drawing — DIN 933 M10 × 20k 6.4L 20⌀17.77⌀10
DIN 933 M10 × 20 — Hexagon headNominal dimensions in mm · Not to scale
Diameter10 mm
Length20 mm
Pitch1.25 mm
Socket size s16 mm
Head height k6.4 mm
HeadHexagon head
DriveExternal hexagon

Dimensions

Standard
DIN 933
Type
Hexagon head bolt
Size
M10 × 20
Thread
M10 × 1.25
Length L
20 mm
Socket size s
16 mm
Head height k
6.4 mm
Drive
External hexagon
Head
Hexagon head

Nominal values in millimetres as published in DIN 933. Estimated weight 12.331 g per piece in steel (12.409 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.

Thread data

Full M10 thread page
DesignationM10 × 1.25 fine
Pitch1.25 mm
Major Ø10 mm
Pitch Ø9.19 mm
Minor Ø ext8.47 mm
Tap drillØ 8.75 mm

Other lengthsDIN 933 M10

All M10 specifications
M10 × 16M10 × 20M10 × 25M10 × 30M10 × 35M10 × 40M10 × 50M10 × 60M10 × 70M10 × 80M10 × 100

Interchangeability

DIN 933 is catalogued with ISO 4017 as its equivalent designation. Dimensions are compared field by field rather than assumed identical.

Equivalent standardISO 4017Hexagon Head Screw — Full Thread, Product Grade A/BComparisonDIN 933 vs ISO 4017Field-by-field differences and a substitution verdict