• Exhaust manifold self locking copper lock nut

Automotive exhaust hexagon self-locking Copper plating nut M8 x A/F12 x H8

A copper lock nut is useful when mounting a manifold to engine cylinder head. A exhaust manifold is subject to high heat which is generated from the engine cylinder, this heat along with vibration from a high revving engine where nuts expand from the heat and loose.
Model : PTN-0051

Product Name Hex Self-locking nut
Material Carbon Steel
Standard DIN2320
Quality     8
Surface Copper plating
Size M8 x A/F12 x H9
Copper Nut | Exhaust Nut | Self locking nut copper platedCopper Nut | Exhaust Nut | Self locking nut copper plated

M8 x A/F12 x H9

  • What is Automotive exhaust self-locking copper nut?

A locknut, also known as a lock nut, locking nut, self-locking nut, prevailing torque nut, stiff nut or elastic stop nut, is a nut that resists loosening under vibrations and torque. An automotive exhaust manifold copper lock nut is used in conjunction with an exhaust stud, a lock nut is just like a standard nut, but the lock nut has the added function of locking itself to the stud thread.



  • The feature of Automotive exhaust self-locking copper nut.

The nut is strongly copper-plated and is therefore suitable in areas of extreme heat eg. exhaust manifolds. Suitable for temperatures from -70 to 400 degrees centigrade. 

  • What is Automotive exhaust self-locking copper nut for? 

A exhaust manifold is subject to high heat which is generated from the engine cylinder. The heat along with vibration from a high revving engine where nuts expand from the heat and loose. A copper lock nut is useful when mounting a manifold to engine cylinder head. 

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