This is the pre-bent hard line that goes from the 404 Master Cylinder to the frame junction block.
Please note: This is the line that you need if you are "capping off" the factory air brake booster, or vacuum brake booster. This line and a couple of the 6mm plugs, and your 404 will be just like a vast majority of the non-boosted 404 Unimogs.
NSN 2530-12-122-5894
This parts preceeds:
3404200929
00004290701