BA Zinc Plated Hex Full Nuts
BA Nuts
Arun Fasteners stock a range of BA (British Association) nuts and screws. We have now listed various BA nuts for sale on ebay.
www.ebay.co.uk/arunfasteners
BA threads are used in miniature instruments and modelling and are popular in the model railway community. Somewhat opposite to other thread sizes, the largest is 0BA, up to the smallest we stock – 10BA.
BA Zinc Plated Hexagon Full Nuts (packs of 100), available in 0BA, 3BA, 4BA & 5BA
| BA | Thread pitch | Outside diameter | Threads density | Outside diameter | Spanner | |
| (mm) | (mm) | (in−1) | (in) | (mm) | (in) | |
| 0 | 1.00 | 6.00 | 25.40 | 0.2362 | 10.5000 | 0.4134 |
| 1 | 0.90 | 5.30 | 28.22 | 0.2087 | 9.2750 | 0.3652 |
| 2 | 0.81 | 4.70 | 31.36 | 0.1850 | 8.2250 | 0.3238 |
| 3 | 0.73 | 4.10 | 34.79 | 0.1614 | 7.1750 | 0.2825 |
| 4 | 0.66 | 3.60 | 38.48 | 0.1417 | 6.3000 | 0.2480 |
| 5 | 0.59 | 3.20 | 43.05 | 0.1260 | 5.6000 | 0.2205 |
| 6 | 0.53 | 2.80 | 47.92 | 0.1102 | 4.9000 | 0.1929 |
| 7 | 0.48 | 2.50 | 52.92 | 0.0984 | 4.3750 | 0.1722 |
| 8 | 0.43 | 2.20 | 59.07 | 0.0866 | 3.8500 | 0.1516 |
| 9 | 0.39 | 1.90 | 65.13 | 0.0748 | 3.3250 | 0.1309 |
| 10 | 0.35 | 1.70 | 72.57 | 0.0669 | 2.9750 | 0.1171 |