Bolt Weight
Approximate hex bolt weights by grade, diameter and length — for enquiry sizing and fastener estimates.
Technical preview
Hex bolt
Stainless Steel 316 / 316L
Selected size
M12 × 50
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Spec selection
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Unit
Diameter
Per piece
0.0666kg
Per 100
6.66kg
Total
6.66kg
100 pcs · M12 × 50 mm
Approximate weight in grams per piece. Source: Metric Hex Bolts (M12–M36).
Chart reference
M12 · Metric Hex Bolts (M12–M36)
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| Length | kg / pc | kg / 100 |
|---|---|---|
| 30 mm | 0.0491 | 4.91 |
| 35 mm | 0.0536 | 5.36 |
| 40 mm | 0.058 | 5.8 |
| 45 mm | 0.0621 | 6.21 |
| 50 mmselected | 0.0666 | 6.66 |
| 55 mm | 0.071 | 7.1 |
| 60 mm | 0.0754 | 7.54 |
| 65 mm | 0.0799 | 7.99 |
| 70 mm | 0.0843 | 8.43 |
| 75 mm | 0.0888 | 8.88 |
| 80 mm | 0.0932 | 9.32 |
| 85 mm | 0.0976 | 9.76 |
| 90 mm | 0.102 | 10.2 |
| 95 mm | 0.107 | 10.7 |
Chart data from published fastener weight/size tables. Some grade headings in the source include washer or nut tables — those appear here when selected. Use for estimates and enquiries.
Need density-based bar or plate weights? Open metal weight calculator