HIGH QUALITY replacement M6 and M8 Bolt Sleeve Nuts, these are suitable for use on all STANDARD UK BEDS Available in SILVER and zinc plated to prevent rust M6 and M8 Internal Thread M6 available as 12mm, 15mm, 17mm, 20mm and 25mm Long M8 available as 15mm, 17mm, 20mm and 25mm Long 4mm Allen Key Socket Flat Head with 13mm Diameter Packs of 4, 6, 8, 10 and 12 are available for purchase.