OTTO Excavator Spare Parts Zx300 6Hk1T Clip Bolt 9041106300 904110-6300 9-04110630-0 For Isuzu OTTO Clip Bolt for ZX300 Excavators: Designed for Isuzu 6HK1T engine, part nos. 9041106300/904110-6300/9-04110630-0. Durable, reliable fastening spare part.