ENGINEERING TOOL
M8 Anchor Bolt Weight Chart
Per-piece weights of M8 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.
A M8 J-hook anchor bolt (500 mm shank + hook developed length 6d, carbon steel 7.85 g/cm³) weighs about 0.22 kg per piece; the straight pattern about 0.2 kg — full length table below.
Other sizes
Full PDF
Download the full PDF (M6–M36, all sizes)
Printable chart covering every size in this family — click to download the PDF directly, no email required.
Weight per piece (M8, kg/pc)
| Shank length L (mm) | Straight no add-on | J-Hook hook +48 mm (6d) | L-Bend leg +32 mm (4d) | With Plate plate 32×4 mm |
|---|---|---|---|---|
| 100 | 0.039 | 0.058 | 0.052 | 0.072 |
| 150 | 0.059 | 0.078 | 0.072 | 0.091 |
| 200 | 0.079 | 0.098 | 0.092 | 0.11 |
| 250 | 0.099 | 0.12 | 0.11 | 0.13 |
| 300 | 0.12 | 0.14 | 0.13 | 0.15 |
| 400 | 0.16 | 0.18 | 0.17 | 0.19 |
| 500 | 0.2 | 0.22 | 0.21 | 0.23 |
| 600 | 0.24 | 0.26 | 0.25 | 0.27 |
| 800 | 0.32 | 0.33 | 0.33 | 0.35 |
| 1000 | 0.39 | 0.41 | 0.41 | 0.43 |
| 1200 | 0.47 | 0.49 | 0.49 | 0.51 |
| 1500 | 0.59 | 0.61 | 0.6 | 0.62 |
| 2000 | 0.79 | 0.81 | 0.8 | 0.82 |
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
All values are computed as geometric volume × density (carbon steel 7.85 g/cm³, base metal, coating excluded) — no copyrighted standard tables are reproduced. 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, unwelded-hole-free plate, weld and accessories excluded). The full nominal diameter is used along the shank with no thread reduction.
Boundary: theoretical geometric estimates for quotation, freight and lifting budgets. Actual piece weight varies with the as-built configuration (hook/leg/plate per drawing) and coating (hot-dip galvanizing ≈ +4.5%). Use measured values for trade settlement; send drawings for non-standard configurations.
Corresponding standard page
Open the GB/T 799 standard product page: sizes, materials and finishes, and ordering questions.
Open the GB/T 799 page
Request a quote for this spec
Send M8 straight into the inquiry form, with material, quantity and drawing — we quote to the standard or to your drawing.
Quote M8
FAQ
How much does an M8×500 J-hook anchor bolt weigh?
On the carbon-steel basis (500 mm shank + hook developed length 48 mm = 6d, full diameter) about 0.22 kg per piece. The straight pattern runs about 0.2 kg and the L-bend (leg 32 mm = 4d) about 0.21 kg — see the full length table above.
What is the difference between J-hook and L-bend M8 anchor bolts?
In this chart only the developed add-on differs: J-hook at 6d (+48 mm, GB/T 799 hooked-bolt basis) versus an L-bend leg at 4d (+32 mm, explicit assumption). At L=500: J-hook ≈ 0.22 kg, L-bend ≈ 0.21 kg. Actual hook/leg dimensions follow the drawing.
How is the weight of a M8 anchor bolt with end plate calculated?
Shank weight plus plate weight. The plate is a 32×32×4 mm square (a=4d, t=0.5d, explicit assumption, hole-free welded plate): at L=500 the assembly is about 0.23 kg per piece. For other plate thicknesses, holes or stiffeners, request a quotation to drawing.
What basis are these weights calculated on?
Geometric volume × density (carbon steel 7.85 g/cm³, base metal, coating excluded) — the same formulas as our catalog SKU weights; full nominal diameter with no thread reduction; hook/leg/plate parameters fully disclosed in the basis section. Theoretical estimates — use measured values for trade settlement.
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 M8 nominal diameter.
Related References
Bolt Weight Calculator
Interactive version: anchor / chemical / expansion bolts at any length, with material and coating factors — this size is pre-filled.
M8 Hex Bolt Weight Chart
Per-piece and per-1,000-pcs weights for the same size, including matching nut and washer.
M8 Bolt Torque Chart
K-factor tightening torque by property class and friction state for the same size.
Seismic Anchor Bolt Procurement Guide for Substations
Seismic anchorage design essentials, embedment and acceptance criteria for anchor bolts.
Disclaimer: This chart is an engineering estimation for selection, quotation and freight estimation only. It does not constitute design or acceptance criteria.