M20 High cap nuts DIN1587 A4 1 pcs.

High cap nuts M20 DIN 1587 — A4, 1 pcs.

Nuts with a hexagonal spanner portion and a high closed cap. The threaded hole is blind. The cap covers the mating screw end if its protruding length is selected appropriately.

Technical specifications

• Dimensional reference: DIN 1587
• Catalogue association: PN 82181
• Nut type: High hexagon cap nut
• Nut construction: Closed cap; blind threaded hole
• Female thread d: M20
• Thread pitch P: 2,5 mm
• Thread tolerance: 6H
• Thread standard according to the catalogue: DIN 13-15
• Overall height h — nominal and maximum: 34 mm
• Height h — table minimum for product grade B: 33 mm (table value for product grade B; does not specify the batch product grade)
• Hexagon portion height m — maximum: 16 mm
• Hexagon portion height m — minimum: 14,9 mm
• Cap closure thickness w — minimum: 5 mm
• Width across flats s: 30 mm
• Material: Acid-resistant stainless steel
• Material group: A4
• Mechanical properties standard: ISO 3506-2 (catalogue reference)
• Coating: Without additional coating
• General requirements according to the catalogue: DIN ISO 8992
• Tolerance standard according to the catalogue: DIN ISO 4759-1
• Quantity per pack: 1 pcs.
• Sales unit: piece

The stated standard references and dimensions are catalogue information, without declaring test results for the specific batch.

Material and design

Stainless steel group A4, without additional coating. The hexagonal portion allows tightening with a 30 mm spanner. The closed cap does not make this a self-locking nut or declare a sealed joint.

Diagram dimensions and references:

d — female thread M20; pitch P = 2,5 mm, tolerance 6H.

h — overall height: nominal and maximum 34 mm. The table for product grade B states a minimum of 33 mm; this value does not specify the product grade of the offered batch.

m — hexagon portion height: from 14,9 to 16 mm.

w — minimum cap closure thickness: 5 mm.

s — spanner size: 30 mm.

The catalogue diagram shows a half-section and axial view of the closed cap. It contains only lines and dimensional references; it is not production documentation.

Scope of delivery and selection

The price includes 1 high cap nuts M20 DIN 1587 A4. The product and neutral carton graphics illustrate the family; the number of items in the picture does not specify delivery quantity.

The mating thread must be M20 with 2,5 mm pitch. Select the protruding screw length for the actual hole depth so the screw end does not bottom against the closure before the joint is properly clamped. Height h is not usable thread depth.

Frequently asked questions

How many pieces does the price include?

1 nuts M20 DIN 1587 A4.

What thread does the nut have?

Female thread M20 with coarse pitch 2,5 mm and tolerance 6H.

What is the height and spanner size?

Overall height h is nominally 34 mm, hexagon portion m is 14,9–16 mm, and spanner size s is 30 mm.

Does the screw pass through the cap?

No. The hole is blind and the cap closed. Select the protruding screw end length for the actual hole depth; do not equate it with the entire nut height.