A hex nut weight chart contains the estimated weight in kilograms and millimeters of hex nuts of all sizes, conforming to DIN 934, ISO 4032, ASTM A194, BS 1768 and IS 1364 standards. Purchasing teams, civil engineers and logistics planners use this hex nut weight chart to calculate shipping weights, validate the quotation from suppliers, and load containers or pallets before placing any orders. Because a nut's actual weight changes with both the standard it is made to and the material it is forged from, a chart built on a single generic steel density only tells part of the story. This page gives the standard IS/DIN/ISO base weight chart from M2 to M100, a material-specific weight variance table across ten grades manufactured by Unifit Fastener, a standards cross-reference for buyers converting between drawings, and tables, so you can size, weigh and cost hex nuts accurately in one place.
The table below gives the standard IS 1363 hex nut weight in kilograms, shown per 100 pieces and per 1,000 pieces, for carbon steel nuts across the full commercial size range. Use the per-1,000 column directly for bulk order and container weight planning without converting manually.
| Size | Weight per 100 pcs (kg) | Weight per 1,000 pcs (kg) |
|---|---|---|
| M2 | 0.011 | 0.11 |
| M3 | 0.033 | 0.33 |
| M4 | 0.067 | 0.67 |
| M5 | 0.111 | 1.11 |
| M6 | 0.232 | 2.32 |
| M7 | 0.294 | 2.94 |
| M8 | 0.482 | 4.82 |
| M10 | 1.020 | 10.20 |
| M12 | 1.590 | 15.90 |
| M14 | 2.400 | 24.00 |
| M16 | 3.081 | 30.81 |
| M18 | 4.448 | 44.48 |
| M20 | 6.031 | 60.31 |
| M22 | 7.143 | 71.43 |
| M24 | 10.309 | 103.09 |
| M27 | 15.432 | 154.32 |
| M30 | 21.645 | 216.45 |
| M33 | 27.174 | 271.74 |
| M36 | 37.037 | 370.37 |
| M39 | 47.619 | 476.19 |
| M42 | 57.471 | 574.71 |
| M45 | 72.464 | 724.64 |
| M48 | 92.593 | 925.93 |
| M52 | 108.696 | 1086.96 |
| M56 | 131.579 | 1315.79 |
| M60 | 161.290 | 1612.90 |
| M64 | 185.185 | 1851.85 |
| M72 | 250.000 | 2500.00 |
| M80 | 333.333 | 3333.33 |
| M90 | 454.545 | 4545.45 |
| M100 | 625.000 | 6250.00 |
Weight changes with density, not just size. A stainless steel or Inconel nut in a given size is meaningfully heavier than the same size in carbon steel, while a Titanium nut is close to half the weight. The table below applies each material's density to the base chart above (weight per 100 pieces, in kg) across the material range Unifit Fastener manufactures.
| Size | Carbon Steel | SS 304/316 | Duplex S31803 | S.Duplex S32760 | Inconel 625/718 | Hastelloy C276 | Monel 400 | Titanium Gr2/Gr5 |
|---|---|---|---|---|---|---|---|---|
| M10 | 1.020 | 1.039 | 1.014 | 1.014 | 1.080 | 1.156 | 1.143 | 0.580 |
| M12 | 1.590 | 1.620 | 1.581 | 1.581 | 1.684 | 1.801 | 1.782 | 0.905 |
| M16 | 3.081 | 3.140 | 3.062 | 3.062 | 3.263 | 3.491 | 3.454 | 1.753 |
| M20 | 6.031 | 6.146 | 5.995 | 5.995 | 6.387 | 6.833 | 6.761 | 3.432 |
| M24 | 10.309 | 10.505 | 10.247 | 10.247 | 10.917 | 11.680 | 11.556 | 5.866 |
| M30 | 21.645 | 22.056 | 21.515 | 21.515 | 22.922 | 24.524 | 24.264 | 12.316 |
| M36 | 37.037 | 37.751 | 36.815 | 36.815 | 39.220 | 41.965 | 41.520 | 21.074 |
| M42 | 57.471 | 58.573 | 57.126 | 57.126 | 60.862 | 65.114 | 64.427 | 32.701 |
| M48 | 92.593 | 94.372 | 92.037 | 92.037 | 98.056 | 104.907 | 103.797 | 52.685 |
| M56 | 131.579 | 134.079 | 130.789 | 130.789 | 139.322 | 149.079 | 147.500 | 74.868 |
| M64 | 185.185 | 188.703 | 184.074 | 184.074 | 196.111 | 209.815 | 207.593 | 105.370 |
| M72 | 250.000 | 254.750 | 248.500 | 248.500 | 264.750 | 283.250 | 280.250 | 142.250 |
| M80 | 333.333 | 339.667 | 331.333 | 331.333 | 353.000 | 377.667 | 373.667 | 189.667 |
| M90 | 454.545 | 463.227 | 451.818 | 451.818 | 481.364 | 514.977 | 509.545 | 258.636 |
| M100 | 625.000 | 636.875 | 621.250 | 621.250 | 661.875 | 708.125 | 700.625 | 355.625 |
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| Standard | Region / Organization | Description |
|---|---|---|
| DIN 934 | Germany (DIN) | Metric hex nut, standard height — the most widely referenced European metric standard |
| ISO 4032 | International (ISO) | Metric hex nut, style 1 — dimensionally aligned with DIN 934; the two are commonly treated as equivalents |
| ASTM A194 | USA (ASTM) | Carbon and alloy steel nuts for high-pressure and high-temperature service; covers heavy hex nut dimensions in UNC/UNF threads |
| BS 1768 | United Kingdom (BSI) | Imperial hex nuts in BSW and BSF thread series, used on legacy UK-spec drawings |
| IS 1364 | India (BIS) | Indian metric hex nuts (Old Spec IS 1363/67 and New Spec IS 1363/92), the base reference for most Indian mill drawings |
DIN 934 and ISO 4032 nuts are dimensionally interchangeable in most commercial applications. ASTM A194 covers a broader grade range for pressure and temperature service, detailed grade by grade on our ASTM A194 nut grades and specifications page, and dimensioned in full on our DIN 934 hex nut dimensions guide.
Hex nut weight can be estimated by calculating the volume of the hexagonal body, subtracting the volume of the threaded bore, and multiplying the remaining volume by the material density:
Weight = [(√3 ÷ 2) × F² − (π × (d ÷ 2)²)] × h × ρ
Where F is the across-flats width, d is the nominal bore diameter, h is the nut height (thickness), and ρ is the material density.
Hexagon area = (√3 ÷ 2) × 30² ≈ 779.4 mm²
Bore area = π × 10² ≈ 314.2 mm²
Net cross-section = 779.4 − 314.2 ≈ 465.2 mm²
Volume = 465.2 × 16 ≈ 7,443 mm³ = 7.44 cm³
Weight = 7.44 cm³ × 7.85 g/cm³ ≈ 58.4 g per piece, or approximately 5.84 kg per 100 pieces.
This theoretical result is close to the 6.031 kg per 100 pieces listed for M20 in the base weight chart. The small difference is expected because the formula uses simplified dimensions and does not fully account for thread geometry, chamfers, and other manufacturing details. For other materials or custom sizes, replace the density value with the appropriate material density to estimate the theoretical nut weight.
A standard M12 carbon steel hex nut weighs approximately 1.59 kg per 100 pieces, or 15.9 kg per 1,000 pieces. In stainless steel (SS 304/316) it weighs approximately 1.62 kg per 100 pieces.
No. Stainless steel is roughly 2 percent denser than carbon steel, while nickel alloys such as Inconel, Hastelloy and Monel run 6 to 13 percent heavier, and Titanium is about 43 percent lighter. Always use the material variance table, not the base carbon steel chart, when the nut is not mild or carbon steel.
They are the same data at two order-size scales. Per-100 figures suit small trial or sample orders; per-1,000 figures are the faster reference for bulk and container-load orders, and are simply ten times the per-100 value.
Not exactly. ASTM A194 heavy hex nuts are dimensionally larger across flats and thicker than DIN 934 or ISO 4032 nuts of the same nominal size, so an ASTM A194 nut weighs more than its DIN 934 equivalent. Check the standards comparison table above before substituting one for the other on a drawing.
Yes, the full chart is available as a free PDF download above, with no email sign-up required.
Unifit Fastener manufactures hex nuts from M2 up to M100 (and imperial equivalents) across Carbon Steel, Stainless Steel, Duplex, Super Duplex, Inconel, Incoloy, Hastelloy, Monel, Nickel and Titanium grades.