Mechanical properties of nuts

Mechanical properties of nuts

basic information about the mechanical properties of nuts according to standard ISO 898-2

Threads Strength class
04 05 4 5 6
Try
tensile
Sp
Hardness byVickerse 
(HV)
Try
tensile
Sp
Hardness by
Vickerse 
(HV)
Try
tensile
Sp
Hardness by
Vickerse 
(HV)
Try
tensile
Sp
Hardness by
Vickerse 
(HV)
Try
tensile
Sp
Hardness by
Vickerse 
(HV)
přes do N/mm2 min. max. N/mm2 min. max. N/mm2 min. max. N/mm2 min. max. N/mm2 min. max.
- M4 380 188 302 500 272 353 - - - 520 130 302 600 150 302
M4 M7 580 670
M7 M10 590 680
M10 M16 610 700
M16 M39 510 117 302 630 146 720 170
M39 M100 - - - - 128 - 142
Threads Strength class
04 05 4 5 6
Try
tensile
Sp
Hardness by
Vickerse 
(HV)
Try
tensile
Sp
Hardness by
Vickerse 
(HV)
Try
tensile
Sp
Hardness by
Vickerse 
(HV)
Try
tensile
Sp
Hardness by
Vickerse 
(HV)
Try
tensile
Sp
Hardness by
Vickerse 
(HV)
přes do N/mm2 min. max. N/mm2 min. max. N/mm2 min. max. N/mm2 min. max. N/mm2 min. max.
- M4 800 180 302 900 170 302 1040 272 353 1140 2951) 3531) 1150 2722) 3532)
M4 M7 855 200 915 188 1040 1140 1150
M7 M10 870 940 1040 1140 1160
M10 M16 880 950 1050 1170 1190
M16 M39 920 233 353 920 1060 - - - 1200 -
M39 M100 - 207 - - - - - - - - -
  1. Nut type 1 (ISO 4032)
  2. Nut type 2 (ISO 4033)

Minimum hardness is mandatory only for nuts which can not be tested for tensile and processed materials. For all other nuts minimum hardness are not binding and are valid only as a guideline./products/hexagon-head-wood-screw-blue-zinc-571-steel

M5 hexagonal nuts should be marked with a strength class designation of origin, if it is technically possible. The designation is permitted only on the contact surface and the key areas for use is permitted only to indicate depth.


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