ENGINEERING TOOL
M12 Anchor Bolt Weight Chart
Weight per piece (M12, kg/pc)
| Shank length L (mm) | Straight no add-on | J-Hook hook +72 mm (6d) | L-Bend leg +48 mm (4d) | With Plate plate 48×6 mm |
|---|---|---|---|---|
| 300 | 0.266 | 0.33 | 0.309 | 0.375 |
| 400 | 0.355 | 0.419 | 0.398 | 0.464 |
| 500 | 0.444 | 0.508 | 0.487 | 0.552 |
| 600 | 0.533 | 0.597 | 0.575 | 0.641 |
Per-piece weights of M12 anchor bolts in four configurations — straight, J-hook, L-bend and welded end plate — across the full length range (carbon steel, geometric-volume method), kg and lb, basis fully disclosed.
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Other sizes
Weight per piece (M12, kg/pc)
| Shank length L (mm) | Straight no add-on | J-Hook hook +72 mm (6d) | L-Bend leg +48 mm (4d) | With Plate plate 48×6 mm |
|---|---|---|---|---|
| 100 | 0.089 | 0.153 | 0.131 | 0.197 |
| 150 | 0.133 | 0.197 | 0.176 | 0.242 |
| 200 | 0.178 | 0.241 | 0.22 | 0.286 |
| 250 | 0.222 | 0.286 | 0.265 | 0.33 |
| 300 | 0.266 | 0.33 | 0.309 | 0.375 |
| 400 | 0.355 | 0.419 | 0.398 | 0.464 |
| 500 | 0.444 | 0.508 | 0.487 | 0.552 |
| 600 | 0.533 | 0.597 | 0.575 | 0.641 |
| 800 | 0.71 | 0.774 | 0.753 | 0.819 |
| 1000 | 0.888 | 0.952 | 0.93 | 0.996 |
| 1200 | 1.07 | 1.13 | 1.11 | 1.17 |
| 1500 | 1.33 | 1.4 | 1.37 | 1.44 |
| 2000 | 1.78 | 1.84 | 1.82 | 1.88 |
Cell shows weight per piece (kg/pc, carbon steel 7.85 g/cm³). L = straight shank length (hook/leg/plate excluded); full nominal diameter along the whole shank (no thread reduction).
References
- GB/T 799-2020 — Anchor bolts (CN, official full text; common series — anchor bolts are often custom-designed per project drawing)
- GB/T 192-2003 — General purpose metric screw threads: basic profile (CN, official full text; ISO 68-1 equivalent)
- Metric thread basic profile (ISO 68-1)
- Dimensions cross-checked against industry fastener data libraries; densities are common industry values
Material Density Conversion
Values above are carbon steel (7.85 g/cm³); for other materials multiply by the density factor.
| Material | Density (g/cm³) | Factor |
|---|---|---|
| Carbon / Alloy Steel | 7.85 | ×1.000 |
| Stainless 304 | 7.93 | ×1.010 |
| Stainless 316 | 7.98 | ×1.017 |
| Brass | 8.5 | ×1.083 |
Basis of Calculation & Disclosed Assumptions
Calculation basis
- All values are computed size by size as geometric volume × density (carbon steel 7.85 g/cm³, base metal, coating excluded) — identical formula and parameters as the online weight calculator.
- Straight = cylinder π/4·d²·L; J-hook = shank + hook developed length 6d (GB/T 799 hooked-bolt basis, identical to the online calculator).
- L-bend = shank + leg 4d (explicit assumption — GB/T 799 has no L-type leg table); with-plate = shank + square plate a×a×t (a=4d, t=0.5d, explicit assumption, hole-free plate, weld and accessories excluded).
- The full nominal diameter is used along the shank with no thread reduction.
Scope & limits
- Theoretical geometric estimates for quotation, freight and lifting budgets; use measured values for trade settlement.
- Actual piece weight varies with the as-built configuration (hook/leg/plate per drawing) and coating (hot-dip galvanizing ≈ +4.5%); send drawings for non-standard configurations.
- Theoretical estimate tolerance ±5%.
Cite this chart
YAXIIO. M12 Anchor Bolt Weight Chart. https://www.yaxiio.com/en/tools/anchor-bolt-weight-chart/m12 (accessed 2026-10-29).
Free to cite and embed — attribution required: “YAXIIO” + a link to this page.
FAQ
What is the difference between J-hook and L-bend M12 anchor bolts?
In this chart only the developed add-on differs: J-hook at 6d (+72 mm, GB/T 799 hooked-bolt basis) versus an L-bend leg at 4d (+48 mm, explicit assumption). At L=500: J-hook ≈ 0.508 kg, L-bend ≈ 0.487 kg. Actual hook/leg dimensions follow the drawing.
Are anchor bolts, foundation bolts and J bolts the same thing?
They are names within one product family: "anchor bolt" and "foundation bolt" both denote bolts embedded in a concrete foundation; a "J bolt" is the pattern with a J-shaped hook at the embedded end (the J-Hook column of this chart, hook developed length 6d), while an "L bolt" carries an L-shaped leg (the L-Bend column). All four configurations here are computed geometrically at the M12 nominal diameter.
Next: work out your order, or pick the size by standard
Related References
Bolt Weight Calculator
Interactive version: anchor / chemical / expansion bolts at any length, with material and coating factors — this size is pre-filled.
M12 Hex Bolt Weight Chart
Per-piece and per-1,000-pcs weights for the same size, including matching nut and washer.
M12 Bolt Torque Chart
K-factor tightening torque by property class and friction state for the same size.
Disclaimer: This chart is an engineering estimation for selection, quotation and freight estimation only. It does not constitute design or acceptance criteria.