Specifications
Surface Treatments
Certifications
- ISO 9001 - 2015 Certified
- PED 2014/68/EC
- NACE MR0175/ISO 15156-2
- NORSOK M-650
- DFAR
- MERKBLATT AD 2000 W2/W7/W10
ISO 4032 Hexagon Regular Nuts (Style 1) Dimensional Standard
ISO 4032 Hexagon Regular Nut parameters provide
comprehensive engineering
data for Style 1
fasteners, currently the paramount global standard for metric coarse thread
fastening.
The ISO 4032 specification represents the current apex of global
standardization for metric
coarse pitch regular hexagon nuts, officially designated as "Style 1".
Covering an expansive nominal size range from microscopic M1.6 micro-fasteners up to
massive M64 industrial
nuts, this standard meticulously defines the geometric characteristics necessary to
achieve Product Grade A
tolerances for threads D ≤ M16, and Product Grade B tolerances for threads D > M16.
These product grades dictate the strictness of the dimensional runout, positional
tolerances, and surface
finish, ensuring highly reliable automation in high-volume manufacturing and automated
assembly
environments.
A massive paradigm shift in the global fastener industry involves the ongoing,
decades-long transition from the
legacy German DIN
934
standard to the universally adopted modern ISO 4032 standard.
For mechanical engineers, maintenance technicians, and procurement officers, this
transition presents a profound
technical nuance that drives massive search volume: the two standards are not
dimensionally
identical.
Specifically, the Width Across Flats (WAF) was definitively altered for nominal
sizes M10, M12, M14, and
M22 to harmonize global wrench clearance standards.
For example, a legacy DIN 934
M10 nut requires a 17mm wrench, whereas an ISO 4032 M10 nut is engineered
for a 16mm wrench.
Furthermore, the overall structural height (m) of ISO 4032 nuts is generally
taller than those
manufactured to the older DIN 934 parameters.
This seemingly minor vertical increase is mechanically profound; it expands the total
shear area of the
internal threads, providing substantially greater resistance to thread stripping.
This taller profile aligns the nut's internal load capacity directly with the modern,
high-stress property
classes defined under ISO
898-2.
Because of these highly specific dimensional and structural discrepancies, nuts
conforming to ISO 4032
cannot be blindly substituted with legacy DIN
934 nuts in
high-stress structural boltings, as the older DIN
parts possess inherently reduced loadability and run the risk of premature catastrophic
stripping.
ISO 4032 Hexagon Nuts Dimensions
| Nominal Size | c | da | e | m | s | Weight Per Pc | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Max | Min | Max | Min | Min | Max | Min | Max | Min | ||
| M1.6 | 0.2 | 0.1 | 2.42 | 2 | 3.41 | 1.3 | 1.05 | 3.2 | 3.02 | - |
| M2 | 0.2 | 0.1 | 3.07 | 2.5 | 4.32 | 1.6 | 1.35 | 4 | 3.82 | - |
| M2.5 | 0.3 | 0.1 | 4.07 | 3.5 | 5.45 | 2 | 1.75 | 5 | 4.82 | - |
| M3 | 0.4 | 0.15 | 4.57 | 4 | 6.01 | 2.4 | 2.15 | 5.5 | 5.32 | - |
| M4 | 0.4 | 0.15 | 5.88 | 5 | 7.66 | 3.2 | 2.9 | 7 | 6.78 | - |
| M5 | 0.5 | 0.15 | 6.88 | 6 | 8.79 | 4.7 | 4.5 | 8 | 7.78 | - |
| M6 | 0.50 | 0.15 | 6.75 | 6.00 | 11.05 | 5.20 | 4.90 | 10.00 | 9.78 | - |
| M8 | 0.60 | 0.15 | 8.75 | 8.00 | 14.38 | 6.80 | 6.44 | 13.00 | 12.73 | 0.0046 |
| M10 | 0.60 | 0.15 | 10.80 | 10.00 | 17.77 | 8.40 | 8.04 | 16.00 | 15.73 | 0.0100 |
| M12 | 0.60 | 0.15 | 13.00 | 12.00 | 20.03 | 10.80 | 10.37 | 18.00 | 17.73 | 0.0151 |
| M14 | 0.60 | 0.15 | 15.10 | 14.00 | 23.36 | 12.80 | 12.10 | 21.00 | 20.67 | 0.0235 |
| M16 | 0.80 | 0.20 | 17.30 | 16.00 | 26.75 | 14.80 | 14.10 | 24.00 | 23.67 | 0.0304 |
| M18 | 0.80 | 0.20 | 19.50 | 18.00 | 29.56 | 15.80 | 15.10 | 27.00 | 26.16 | 0.0435 |
| M20 | 0.80 | 0.20 | 21.60 | 20.00 | 32.95 | 18.00 | 16.90 | 30.00 | 29.16 | 0.0587 |
| M22 | 0.80 | 0.20 | 23.70 | 22.00 | 37.29 | 19.40 | 18.10 | 34.00 | 33.00 | 0.0720 |
| M24 | 0.80 | 0.20 | 25.90 | 24.00 | 39.55 | 21.50 | 20.20 | 36.00 | 35.00 | 0.0983 |
| M27 | 0.80 | 0.20 | 29.10 | 27.00 | 45.20 | 23.80 | 22.50 | 41.00 | 40.00 | 0.1442 |
| M30 | 0.80 | 0.20 | 32.40 | 30.00 | 50.85 | 25.60 | 24.30 | 46.00 | 45.00 | 0.2022 |
| M33 | 0.80 | 0.20 | 35.60 | 33.00 | 55.37 | 28.70 | 27.40 | 50.00 | 49.00 | 0.2584 |
| M36 | 0.80 | 0.20 | 38.90 | 36.00 | 60.79 | 31.00 | 29.40 | 55.00 | 53.80 | 0.3586 |
| M39 | 1.00 | 0.30 | 42.10 | 39.00 | 66.44 | 33.40 | 31.80 | 60.00 | 58.80 | 0.4678 |
| M42 | 1.00 | 0.30 | 45.40 | 42.00 | 71.30 | 34.00 | 32.40 | 65.00 | 63.10 | 0.5908 |
| M45 | 1.00 | 0.30 | 48.60 | 45.00 | 76.95 | 36.00 | 34.40 | 70.00 | 68.10 | 0.7528 |
| M48 | 1.00 | 0.30 | 51.80 | 48.00 | 82.60 | 38.00 | 36.40 | 75.00 | 73.10 | 0.8989 |
| M52 | 1.00 | 0.30 | 56.20 | 52.00 | 88.25 | 42.00 | 40.40 | 80.00 | 78.10 | 1.1251 |
| M56 | 1.00 | 0.30 | 60.50 | 56.00 | 93.56 | 45.00 | 43.40 | 85.00 | 82.80 | 1.3227 |
| M60 | 1.00 | 0.30 | 64.80 | 60.00 | 99.21 | 48.00 | 46.40 | 90.00 | 87.80 | 1.5750 |
| M64 | 1.00 | 0.30 | 69.10 | 64.00 | 104.86 | 51.00 | 49.10 | 95.00 | 92.80 | 1.8190 |
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