Land Rover Defender Chassis to Crossmember Stainless Steel Fixing Kit
A4-80 is the equivalent of Mild Steel 8.8 high tensile bolts
Kits Consists of;
16no M8 A4-80 x 30mm Hex Head Bolts
4no M8 A4-80 x 70mm Hex Head Bolts
40no M8 A4 Flat Washer
16no M8 A4-80 Nylon Nut

You have all the fixings to fit;
Mid Cross Member to Chassis
Mid Cross Member to Body
Mid Cross Member Bracket to Sill Rail & Mid Crossmember