Leading UK Manufacturer of BS 7419 Foundation Bolts
We specialise in the manufacture and supply of holding down bolts and associated anchoring accessories, including standard BS 7419 Square-Square foundation bolts.
With extensive in-house production capabilities, including hot upset forging and precision thread rolling or cutting, we maintain a standard range of bolts to BS 7419, while keeping blanks in stock to facilitate the rapid production of non-standard lengths. Whether for large-scale civil infrastructure or specific industrial anchoring requirements, we provide a complete, bespoke manufacturing solution with full traceability.
| THREAD DIA | A | M16 | M20 | M24 | M30 | M36 | M42 | M48 | M56 | M64 |
|---|---|---|---|---|---|---|---|---|---|---|
| B | MAX | 122 | 127.5 | 133 | 140.5 | 148 | 155.5 | 163 | 172.5 | 182 |
| MIN | 116 | 120 | 124 | 130 | 136 | 142 | 148 | 156 | 164 | |
| SHANK DIA | MAX | 16.7 | 20.84 | 24.84 | 30.84 | 37 | 43 | 49 | 57.2 | 65.2 |
| MIN | 15.3 | 19.16 | 23.16 | 29.16 | 35 | 41 | 47 | 54.8 | 62.8 | |
| C | MAX | 24 | 30 | 36 | 46 | 55 | 65 | 75 | 85 | 95 |
| MIN | 23.16 | 29.16 | 35 | 45 | 53.8 | 63.1 | 73.1 | 82.8 | 92.8 | |
| D | MAX | 16.7 | 20.84 | 24.84 | 30.84 | 37 | 43 | 49 | 57.2 | 65.2 |
| MIN | 15.3 | 19.16 | 23.16 | 29.16 | 35 | 41 | 47 | 54.8 | 62.8 | |
| E | NOM | 10 | 12.5 | 15 | 18.7 | 22.5 | 26 | 30 | 35 | 40 |
| MIN | 9.25 | 11.6 | 14.1 | 17.65 | 21.45 | 24.95 | 28.95 | 33.75 | 38.75 | |
| MAX | 10.75 | 13.4 | 15.9 | 19.75 | 23.55 | 27.05 | 31.05 | 36.25 | 41.25 | |
| F | NOM | 8 | 10 | 12 | 15 | 18 | 21 | 24 | 28 | 32 |
| MIN | 7.25 | 9.25 | 11.1 | 14.1 | 17.1 | 19.95 | 22.95 | 26.95 | 30.75 | |
| MAX | 8.75 | 10.75 | 12.9 | 15.9 | 18.9 | 22.05 | 25.05 | 29.05 | 33.25 | |
| L | FOR DIMENSIONS SEE TABLE BELOW. NON STANDARD LENGTHS AVAILABLE UPON REQUEST |
|||||||||
| M16 | M20 | M24 | M30 | M36 | |||||
|---|---|---|---|---|---|---|---|---|---|
| mm | Weight (kg) | mm | Weight (kg) | mm | Weight (kg) | mm | Weight (kg) | mm | Weight (kg) |
| 300 | 0.53 | 300 | 0.85 | --- | --- | --- | --- | --- | --- |
| 375 | 0.64 | 375 | 1.03 | 375 | 1.51 | --- | --- | --- | --- |
| 450 | 0.76 | 450 | 1.22 | 450 | 1.78 | 450 | 2.90 | 450 | 4.22 |
| 525 | 0.88 | 525 | 1.43 | 525 | 2.04 | 525 | 3.35 | 525 | 4.82 |
| 600 | 1.00 | 600 | 1.58 | 600 | 2.31 | 600 | 3.77 | 600 | 5.42 |
| --- | --- | 750 | 1.95 | 750 | 2.84 | 750 | 4.60 | 750 | 6.62 |
| --- | --- | 1000 | 2.00 | 1000 | 3.72 | 1000 | 5.95 | 1000 | 8.62 |
| --- | --- | --- | --- | 1250 | 4.61 | 1250 | 7.34 | 1250 | 10.62 |
| TOLERANCES ON NOMINAL LENGTH (L) | |
|---|---|
| NOMINAL LENGTH (mm) | TOLERANCE (mm) |
| 250 < L ≤ 315 | ± 5.2 |
| 315 < L ≤ 400 | ± 5.7 |
| 400 < L ≤ 500 | ± 6.3 |
| 500 < L ≤ 630 | ± 7.0 |
| 630 < L ≤ 800 | ± 8.0 |
| 800 < L ≤ 1000 | ± 9.0 |
| 1000 < L ≤ 1250 | ± 10.5 |
| > 1250 | PER AGREEMENT |
