4BA Full Nuts (BS 57:1951) - Brass Imperial BA Hexagon Full Nuts are a standard fastener, most commonly used for attaching bolts and screws. Full Nuts are extremely versatile and may be used in a broad range of fixtures and fittings. BA, or British Association Thread, was introduced in 1884 and is gradually being phased out in favour of metric fasteners, but is still widely used in various sectors around the UK. These BA Hexagon Full Nuts are made from Brass. For larger quantities or items not listed, please email and one of our team will provide you with a quotation. 4BA Full Nuts (BS 57:1951) - Brass