General description Light Duty High Temperature Flame Retardant Anti-Vibration Rubber Lined U-bolt is designed for use with 25 mm nominal bore (NB) pipes. Constructed from galvanised mild steel, this U-bolt features a high-temperature flame retardant rubber lining that provides excellent vibration dampening and protection against corrosion. Technical specifications Internal Diameter (ID): 34 mm Nominal Bore (NB): 25 mm Pipe Outer Diameter (O/D): 33.7 mm Thread Size: 6 mm Backing Pad Dimensions: 25 mm x 10 mm Material: Galvanised Mild Steel Material Grade: Railway Grade Silicone 60 sh Temperature Rating: -40 up to +300°C Flame Retardant Additive: 2% Tensile Strength: 8.5 – 13 N/mm² Elongation: 400 - 600% Tear Strength: 18 – 30 N/mm Specific Gravity: 1.12 - 1.16 Oxygen Index: 29% Flammability Test Extinction Time: 64 seconds Tolerance on dimensions: +/- 1 mm Usage Reduces or eliminates noise and fatigue due to vibration of pipework against the supporting structure. Prevents galvanic