The alm gh004 aluminium square head bolts and nuts are specialist fixings designed for the assembly and construction of aluminium greenhouses. These aluminium bolts feature a distinctive square head design that provides secure fastening in greenhouse construction projects. Manufactured by alm, these square glaze bolts and nuts are specifically engineered for use with aluminium greenhouse frames, making them ideal for both new builds and repairs of existing structures. The aluminium construction ensures compatibility with aluminium framework whilst preventing galvanic corrosion that can occur when mixing dissimilar metals. Beyond greenhouse construction, these versatile fixings are also suitable for assembling greenhouse shelving and staging systems. The square head design provides a positive grip during installation, making them practical for various aluminium framework applications where secure, weather resistant fastening is required. Features and benefits bull aluminium construction prevents corrosion in outdoor environments bull square head design for secure grip during assembly bull compatible with most aluminium greenhouse systems bull suitable for shelving and staging installation specifications part glaze bolts nuts pack size 20