YaM-5 box mine
[Image:Yam-5.svg|thumb|300px|A diagram of a YaM-5 anti-tank mine from a US army publication. 1 - pressure block, 2 - staple, 3 - wooden peg or nail, 4 - striker-retaining pin, 5 - overlapping edge of lid, 6 - paper wrapped explosive, 7 - fuze holder block, 8 - fuze well, 9 - booster charge]
The YaM-5 was a Soviet anti-tank blast mine with a wooden case. The mine was widely used during Great Patriotic War. Wood was chosen as primary material for its availability, cheapness and ease of handling; for example, in 1942, several thousand cases were produced at Tuymen Plywood Factory by patriotic young volunteers as an after-school activity. Various types of wood were used.
The mine consists of a rectangular wooden box with a hinged lid that overlaps the front of the mine. A slot in the hinged lid's side through which an MUV pull fuse is placed. A wooden pressure bar is sometimes used on the edge of the lid above the slot. A nail is placed horizontally through the loop of the MUV fuse's striker retaining pin and two loops on the bottom of the lid's slot.
A YaM-10 was also produced; it was a scaled-up version of the YaM-5.
The wooden case was normally painted olive green, gray or white.
The mine was frequently used with anti-handling devices.
Downward pressure on the lid forced the nail downwards; withdrawing the striker retaining pin detonated the mine.