1) Nails used in the making of brigandines.
The brigandine or brigander was body armour. In an OED reference of 1465 it is described as J peyr of Bregandyrns kevert with … gylt naile. The nails that were being imported into Hull in the fifteenth century may have been for the ‘brigander makers’ based in York: 1453 1 bar’ nayles 8 0 0, Hull
1489-90 brygandyne nallys, Hull.