18 standards76 specification pages

M20 Fasteners

All M20 screws, bolts, nuts and washers in the database. M20 has a nominal major diameter of 20 mm with a standard coarse pitch of 2.5 mm, across 18 standards.

Nominal Ø20 mm
Coarse pitch2.5 mm
Pitch Ø18.38 mm
Tap drill17.5 mm

M20 thread dimensions

Full thread page
Designation
M20 × 2.5
Major diameter
20 mm
Pitch
2.5 mm
Pitch diameter
18.38 mm
Minor diameter — external
16.93 mm
Minor diameter — internal
17.29 mm
Tap drill size
Ø 17.5 mm

M20 Screws

28 pages
DIN 912Hexagon Socket Head Cap Screw
M20 × 30M20 × 35M20 × 40M20 × 50M20 × 60M20 × 80M20 × 100
ISO 4762Hexagon Socket Head Cap Screw
M20 × 30M20 × 35M20 × 40M20 × 50M20 × 60M20 × 80M20 × 100
DIN 7991Hexagon Socket Countersunk Head Screw
M20 × 30M20 × 35M20 × 40M20 × 50M20 × 60M20 × 80M20 × 100
ISO 10642Hexagon Socket Countersunk Head Screw
M20 × 30M20 × 35M20 × 40M20 × 50M20 × 60M20 × 80M20 × 100

M20 Bolts

38 pages
DIN 933Hexagon Head Screw / Bolt — Full Thread
M20 × 30M20 × 35M20 × 40M20 × 50M20 × 60M20 × 70M20 × 80M20 × 100M20 × 120
ISO 4017Hexagon Head Screw — Full Thread, Product Grade A/B
M20 × 30M20 × 35M20 × 40M20 × 50M20 × 60M20 × 70M20 × 80M20 × 100M20 × 120
DIN 931Hexagon Head Bolt — Partial Thread
M20 × 40M20 × 50M20 × 60M20 × 70M20 × 80M20 × 100M20 × 120M20 × 140M20 × 160M20 × 180
ISO 4014Hexagon Head Bolt — Partial Thread, Product Grade A/B
M20 × 40M20 × 50M20 × 60M20 × 70M20 × 80M20 × 100M20 × 120M20 × 140M20 × 160M20 × 180

M20 Nuts

7 pages
DIN 934Hexagon Full Nut
M20
ISO 4032Hexagon Regular Nut, Style 1
M20
DIN 439Hexagon Thin Nut (Jam Nut)
M20
ISO 4035Hexagon Thin Nut, Chamfered
M20
DIN 985Prevailing Torque Hexagon Nut with Nylon Insert
M20
ISO 10511Prevailing Torque Hexagon Nut with Non-Metallic Insert
M20
ISO 4161Hexagon Flange Nut
M20

M20 Washers

3 pages
ISO 7089Flat Washer — Normal Series, 200 HV
M20
DIN 125 AFlat Washer — Normal Series, 140 HV
M20
DIN 127Spring Lock Washer — Square Section
M20

Browse other sizes

M10M12M14M16M18M2M2.5M20M22M24M3M3.5M4M5M6M8