Fastener Weight Reference Guide
Approximate weights per 100 pieces for common fastener types and sizes, useful for logistics and cost estimation.
Knowing fastener weights is essential for transport logistics, structural load calculations, and procurement estimation. The following tables provide approximate weights per 100 pieces for common mild steel (MS) fasteners. Stainless steel variants weigh approximately the same; zinc-plated weights are nearly identical.
Hex Bolts (Mild Steel, Full Thread)
| Size x Length | Weight per 100 pcs (kg) |
|---|---|
| M6 x 20mm | 0.68 |
| M6 x 40mm | 1.02 |
| M8 x 25mm | 1.35 |
| M8 x 40mm | 1.82 |
| M8 x 50mm | 2.16 |
| M10 x 30mm | 2.38 |
| M10 x 50mm | 3.35 |
| M10 x 75mm | 4.60 |
| M12 x 40mm | 4.32 |
| M12 x 50mm | 5.10 |
| M12 x 75mm | 6.85 |
| M16 x 50mm | 9.50 |
| M16 x 75mm | 12.60 |
| M16 x 100mm | 15.70 |
| M20 x 60mm | 17.00 |
| M20 x 80mm | 21.00 |
| M20 x 100mm | 25.20 |
| M24 x 80mm | 34.50 |
| M24 x 100mm | 41.00 |
Hex Nuts (Mild Steel)
| Size | Weight per 100 pcs (kg) |
|---|---|
| M6 | 0.32 |
| M8 | 0.72 |
| M10 | 1.25 |
| M12 | 2.10 |
| M16 | 4.80 |
| M20 | 9.20 |
| M24 | 15.80 |
| M30 | 30.00 |
Plain Washers (Mild Steel)
| Size (Bolt Dia) | Weight per 100 pcs (kg) |
|---|---|
| M6 | 0.18 |
| M8 | 0.36 |
| M10 | 0.58 |
| M12 | 0.96 |
| M16 | 1.88 |
| M20 | 3.60 |
| M24 | 5.30 |
| M30 | 9.40 |
Weight Estimation Notes
- —Weights are approximate and may vary by +/- 5% depending on manufacturing tolerances
- —BSW/Imperial bolt weights differ slightly from metric equivalents
- —Half-thread bolts are lighter than full-thread bolts of the same size
- —For bulk orders, contact us for exact weight calculations based on your requirements
Disclaimer: Values provided in this reference are approximate and intended for general guidance only. Actual specifications may vary based on manufacturing tolerances, surface conditions, and environmental factors. Always consult relevant IS/ISO/ASTM standards and project engineering specifications for critical applications. Pankaj Fasteners Pvt. Ltd. assumes no liability for the use of these reference values in design or construction.
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