This Sirius Roofing Bolt and Nut is an M5 x 20mm fastener, a versatile short-to-medium length suitable for sheet materials, lightweight roofing panels and cladding fixings. The domed head and square neck allow quick, secure installation with a spanner or socket. Features and Benefits: • Supplied complete with matching nut • Large domed head for a neat finish • Square neck prevents spinning during tightening • High-quality steel construction • Precision metric threads Spe
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