A contact fuze, impact fuze, percussion fuze or direct-action fuze is the fuze that is placed in the nose of a bomb or shell so that it will detonate on contact with a hard surface.
No. 106 fuze
In military munitions, a fuze is the part of the device that initiates its function. In some applications, such as torpedoes, a fuze may be identified by function as the exploder. The relative complex
Contact fuze
…A contact fuze, impact fuze, percussion fuze or direct-action (D.A.) fuze (UK) is the fuze that is placed in the nose of a bomb or shell so that it will detonate on contact with a hard surface. Many impacts are unpredictable: they may involve…
Wooden grenade fuse from the 17th Century, broken open vertically, with preserved delay charge.
Mk 53 Proximity fuze for an artillery shell, c. 1945
A modern multichannel radio remote detonator, in 2015.
The contact fuze of a G7a torpedo, a hybrid design using both impact and swing-arm inertial triggering.