Our premium heavy hex bolting sets are engineered for reliable performance in ASME B16.5 / B16.1 / B16.47 flanged joints. Each complete assembly includes a heavy hex bolt, a matching heavy hex nut, and an optional hardened plain washer, providing superior load distribution and wrench engagement. These components ensure secure gasket compression and maintain long-term joint integrity under demanding service conditions.
Available size
| Size | Flange bolting | Heavy hex bolt | Heavy hex nut and plain washer | Ref. No. |
|---|---|---|---|---|
| 1/2″ / DN15 / 21.3mm | 4 x 5/8″ | 1/2″ (M14) x 45 | 1/2″ (M14) | N9601 |
| 3/4″ / DN20 / 26.7mm | 4 x 5/8″ | 1/2″ (M14) x 45 | 1/2″ (M14) | N9602 |
| 1″ / DN25 / 33.4mm | 4 x 5/8″ | 1/2″ (M14) x 50 | 1/2″ (M14) | N9603 |
| 1-1/4″ / DN32 / 42.2mm | 4 x 5/8″ | 1/2″ (M14) x 50 | 1/2″ (M14) | N9604 |
| 1-1/2″ / DN40 / 48.3mm | 4 x 5/8″ | 1/2″ (M14) x 55 | 1/2″ (M14) | N9605 |
| 2″ / DN50 / 60.3mm | 4 x 3/4″ | 5/8″ (M16) x 60 | 5/8″ (M16) | N9606 |
| 2-1/2″ / DN65 / 73.0mm | 4 x 3/4″ | 5/8″ (M16) x 65 | 5/8″ (M16) | N9607 |
| 3″ / DN80 / 88.9mm | 4 x 3/4″ | 5/8″ (M16) x 70 | 5/8″ (M16) | N9608 |
| 4″ / DN100 / 114.3mm | 8 x 3/4″ | 5/8″ (M16) x 75 | 5/8″ (M16) | N9609 |
| 5″ / DN125 / 141.3mm | 8 x 7/8″ | 3/4″ (M20) x 75 | 3/4″ (M20) | N9610 |
| 6″ / DN150 / 168.3mm | 8 x 7/8″ | 3/4″ (M20) x 80 | 3/4″ (M20) | N9611 |
| 8″ / DN200 / 219.1mm | 8 x 7/8″ | 3/4″ (M20) x 85 | 3/4″ (M20) | N9612 |
| 10″ / DN250 / 273.0mm | 12 x 1″ | 7/8″ (M24) x 95 | 7/8″ (M24) | N9613 |
| 12″ / DN300 / 323.8mm | 12 x 1″ | 7/8″ (M24) x 95 | 7/8″ (M24) | N9614 |
| 14″ / DN350 / 355.6mm | 12 x 1-1/8″ | 1″ (M27) x 105 | 1″ (M27) | N9615 |
Note:
Please download our catalog for more available sizes.
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