5/8"UNC LOCK HALF-NUT Z/P BS1768/1981 is a high-performance fastener designed to meet industry standards, ensuring strength and reliability. With a zinc-plated, galvanised, or brass finish, it provides excellent resistance against corrosion for long-lasting use. Whether securing structures, assembling machinery, or fastening materials in construction, this component guarantees precision and durability. Engineered for professional and industrial applications, ensuring a secure and lasting fit.