Domed Cap Nut

DIN 1587 (Current)

Material
Stainless Steel, Carbon Steel
Property Class
A2-70, A4-80, 6, 8 and more
Finish
Passivated, Plain, Zinc Plated, Nickel Plated
Size range
M4–M24
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Select sizes and quantities — 9 confirmed sizes to DIN 1587

Material
Grade
Stainless SteelCarbon Steel
Finish
dNominal Diameter (mm)PThread Pitch (mm)sWidth Across Flats (max) (mm)eWidth Across Corners (min) (mm)mNut Height (mm)hOverall Height (mm)MOQQuantity and inquiry
M40.777.663.281000
M50.888.794101000
M611011.055121000
M81.251314.386.515600
M101.51617.77818600
M121.751820.031022400
M1622426.751328400
M202.53033.531634200
M2433639.981942200

Showing 9 of 9 sizes

M4 × 0.7 × 7 × 7.66 × 3.2 × 8 × 6.5 × 5.9 × 4.6

dNominal Diameter (mm)M4
PThread Pitch (mm)0.7
sWidth Across Flats (max) (mm)7
eWidth Across Corners (min) (mm)7.66
mNut Height (mm)3.2
hOverall Height (mm)8
MOQ1000

M5 × 0.8 × 8 × 8.79 × 4 × 10 × 7.5 × 6.9 × 5.75

dNominal Diameter (mm)M5
PThread Pitch (mm)0.8
sWidth Across Flats (max) (mm)8
eWidth Across Corners (min) (mm)8.79
mNut Height (mm)4
hOverall Height (mm)10
MOQ1000

M6 × 1 × 10 × 11.05 × 5 × 12 × 9.5 × 8.9 × 6.75

dNominal Diameter (mm)M6
PThread Pitch (mm)1
sWidth Across Flats (max) (mm)10
eWidth Across Corners (min) (mm)11.05
mNut Height (mm)5
hOverall Height (mm)12
MOQ1000

M8 × 1.25 × 13 × 14.38 × 6.5 × 15 × 12.5 × 11.6 × 8.75

dNominal Diameter (mm)M8
PThread Pitch (mm)1.25
sWidth Across Flats (max) (mm)13
eWidth Across Corners (min) (mm)14.38
mNut Height (mm)6.5
hOverall Height (mm)15
MOQ600

M10 × 1.5 × 16 × 17.77 × 8 × 18 × 15 × 14.6 × 10.8

dNominal Diameter (mm)M10
PThread Pitch (mm)1.5
sWidth Across Flats (max) (mm)16
eWidth Across Corners (min) (mm)17.77
mNut Height (mm)8
hOverall Height (mm)18
MOQ600

M12 × 1.75 × 18 × 20.03 × 10 × 22 × 17 × 16.6 × 13

dNominal Diameter (mm)M12
PThread Pitch (mm)1.75
sWidth Across Flats (max) (mm)18
eWidth Across Corners (min) (mm)20.03
mNut Height (mm)10
hOverall Height (mm)22
MOQ400

M16 × 2 × 24 × 26.75 × 13 × 28 × 23 × 22.5 × 17.3

dNominal Diameter (mm)M16
PThread Pitch (mm)2
sWidth Across Flats (max) (mm)24
eWidth Across Corners (min) (mm)26.75
mNut Height (mm)13
hOverall Height (mm)28
MOQ400

M20 × 2.5 × 30 × 33.53 × 16 × 34 × 28 × 27.7 × 21.6

dNominal Diameter (mm)M20
PThread Pitch (mm)2.5
sWidth Across Flats (max) (mm)30
eWidth Across Corners (min) (mm)33.53
mNut Height (mm)16
hOverall Height (mm)34
MOQ200

M24 × 3 × 36 × 39.98 × 19 × 42 × 34 × 33.3 × 25.9

dNominal Diameter (mm)M24
PThread Pitch (mm)3
sWidth Across Flats (max) (mm)36
eWidth Across Corners (min) (mm)39.98
mNut Height (mm)19
hOverall Height (mm)42
MOQ200

Product details

Description
This domed cap nut is produced to DIN 1587 and features a closed end that covers exposed threads. The hexagon body is driven by standard spanners and sockets. It is supplied in metric diameters from M4 to M24, with coarse and fine pitches as defined by the standard. Material options include carbon steel in grades 6, 8, and 10, and stainless steel in grades A2-70 and A4-80. Surface finishes available are zinc plated, nickel plated, plain, and passivated. When requesting a quotation, specify the diameter, material, grade, and finish required.
Features
Closed domed end covers exposed threads · Hexagon body driven by standard spanners and sockets · Available in M4 to M24 diameters · Supplied in carbon steel grades 6, 8, 10 and stainless steel A2-70, A4-80
Applications
Joints subject to vibration, Machinery and moving equipment, Automotive and vehicle assembly

Order assurance

Confirmed for the quoted product and order.

Reports & inspection

Agreed in the quotation.

  • EN 10204 3.1 material certificate
  • Dimensional inspection report
  • Certificate of conformity
  • Mechanical test report
  • Chemical analysis report
  • Coating inspection report
  • Batch and lot traceability

Packaging & delivery

Options we supply.

  • Bulk carton packing
  • Small boxes with outer cartons
  • Palletized shipment
  • Fumigation-free pallets
  • Inner poly bags
  • Buyer branding and labels

Product questions

What sizes of Domed Cap Nut do you supply?

Execution standard: DIN 1587. The confirmed specification table covers M4–M24 diameters. Use the specification table to select the exact variant required for quotation.

Which materials, grades and finishes can I order?

Material: Stainless Steel, Carbon Steel; Property class: A2-70, A4-80, 6, 8, 10; Finish: Passivated, Plain, Zinc Plated, Nickel Plated. Availability should be confirmed against the selected specification and order quantity.

Where are these locking nuts typically used?

Typical applications include Joints subject to vibration, Machinery and moving equipment, Automotive and vehicle assembly. Final suitability depends on the selected material, grade, finish and operating conditions.

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