BYG500070 is a countersunk Torx drive bolt used to secure the front door hinge assembly on the Land Rover Defender. Rated M8 x 55mm, it fastens the hinge to the door or body structure and must be correctly torqued to maintain door alignment and prevent hinge movement under load. Using an incorrect fastener - wrong thread pitch, length, or head type - risks stripping the hinge mounting or allowing door sag over time. Key Features M8 x 55mm countersunk bolt with Torx drive head for flush seating against the hinge face Countersunk profile ensures the bolt sits flush, preventing interference with hinge operation or door closure Genuine Land Rover OEM part number BYG500070, specified for the Defender hinge assembly from VIN 7A000001 onwards Multiple bolts are typically required per hinge - check the number of mounting points before ordering Vehicle Fitment Fits Land Rover Defender (2007 onwards) from VIN 7A000001, front door hinge assembly applications. Not sure about fitment? Feel free to get in touch at [email protected]