Self-locking copper nut M8/12

Self-locking nuts with M8x1.25 thread, copper-clad, hardness of 10.9, wrench 12. Necessary for installation of exhaust manifolds, turbocharger, downpipe, exhaust system components and other auto parts as well. Thick copper overlay ensures that the nuts do not rust even at very high temperatures. The cut, as seen in the picture, prevents unauthorised twisting off of the nut.

Thread: M8x1.25

Hardness: 10.9

Wrench: 12