Malleable cast iron backnut (Recessed) is hexagonal nuts with female threaded connection, and it is used to tighten nipple or other pipe joint, so to avoid slippage.
Available size
| Size | A (mm) | Ref. No. |
|---|---|---|
| 1/2″ / DN15 / 21.3mm | 7.9 | M2101 |
| 3/4″ / DN20 / 26.9mm | 8.6 | M2102 |
| 1″ / DN25 / 33.7mm | 9.7 | M2103 |
| 1-1/4″ / DN32 / 42.4mm | 10.7 | M2104 |
| 1-1/2″ / DN40 / 48.3mm | 11.9 | M2105 |
| 2″ / DN50 / 60.3mm | 13.5 | M2106 |
| 4″ / DN100 / 114.3mm | 20.3 | M2107 |
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