Hexagon nut

A hexagon nut is a nut having the form of a regular Hexagone.

Symbology

The following symbols are used on this page. All dimensions hereafter are given in Millimètre S (mm).
ATTENTION: All dimensions hereafter are valid only in the case of hexagon nuts in metric series. For other series such as nuts ANSI and/or other particular profiles of nuts and/or step of nuts, to refer to the standards specifically applied.

D = nominal diameter of the nut (diametric dimension in net bottom).
H / h1 = nominal height of the nut.
H2 = height of a low nut .
h3 = height of a high nut .
hsl = height of a following nut D
K = dimensions enter the opposite dishes of the hexagon nut.
p = not of threading (not nominal)

Height of a nut

There exists in several Height S, always in relation to the diameter of the Filetage (d):

h1 - usual Nut - between 0,75 and 0,8d - (Standards ISO 4032/NF IN 24032/DIN IN 24032)
H2 - low Nut - between 0,5 and 0,6d - (Standards ISO 4039/NF IN 24033/DIN IN 24033)
h3 - high Nut - approximately 0,9d - (Standards ISO 4035/NF IN 24035/DIN IN 24035)
hsl - very high Nut - D = H
extra-light (symbol HMZ ) (not represented in the tables below)

Example: for a threading of M10: the normal nut ( h1 ) has a thickness of 8mm, the top ( h3 ) 10mm, bottom ( H2 ) 5mm.

Rank and type of a nut

The state of completion of a nut is called rank of the product . Its level of fiablility is called standard .

Rank C : Nuts cold forged or hot without finishing
Rank B : Nuts cold forged or hot with possible finishing (D lower than M16)
Grade has : Nuts forged cold or hot with possible finishing (D equal M16 and more)

Standard 1 : Product subjected to a quality control and dimensional reinforced.
Standard 2 : Product subjected to a quality control and dimensional standard.
Standard 3 : Product subjected to the controls reduced on sampling.

Dimensions

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