General description Light Duty Flame Retardant Anti-Vibration Rubber Lined U-bolt designed for 89 mm ID pipes, suitable for 80 mm NB pipes. This product features a galvanized U-bolt with a rubber lining that helps reduce noise and fatigue caused by vibration in pipework. It also prevents galvanic corrosion and wear on composite or non-ferrous pipework. Technical specifications Inner Diameter (ID): 89 mm Nominal Bore (NB): 80 mm Pipe Outer Diameter (O/D): 88.9 mm Backing Pad Dimensions: 25 mm x 10 mm Thread Size: 12 mm Overall Length (B): 57.5 mm Overall Height (C): 70 mm Overall Width (F): 100 mm Length of U-bolt (K): 75 mm Material: Galvanized Mild Steel with Flame Retardant Rubber Lining Tolerance on dimensions: +/- 1 mm Other information Material Grade: Railway Grade Silicone 80sh Postcured for minimum 4 hours at 200°C Flammability Temperature Index: 352°C Dielectric Strength (2 mm thickness): approx 24 KV/mm Smoke Density: 0.005 m²/g Toxic Flame Emission: R 0.12