Nail Grenade

Effective fragmentation grenades can be made from e block of TNT or other blasting explosive and nails.


  • Block of TNT or other blasting explosive
  • Nails
  • Non-Electric Military blasting cap
  • Fuse Cord
  • Tape, string, wire or glue


1. If an explosive charge other than a standard TNT block is used, make a hole in the center of the charge for inserting the blasting cap. TNT can be drilled with relative safety. With plastic explosives, a hole can be made by pressing a round stick into the center of the charge The hole should be deep enough that the blasting cap is totally within the explosive.

2. Tape, tie or glue one or two rows of closely packed nails to sides of explosive block. Nails should completely cover the four surfaces of the block.

3. Place blasting cap on one end of the fuse cord and crimp with pliers.

NOTE: To find out how long the fuse cord should be, check the time it takes a known length to burn. If 12 inches (30 cm) burns for 30 seconds, a 10 second delay will require a 4 inch (10 cm) fuse.

4. Insert the blasting cap in the hole in the block of explosive. Tape or tie fuse cord securely in place so that it will not fall out when the grenade is thrown.


An effective directional anti-personnel mint can be made by placing mils on only one side of the explosive block. For this case, an electric blasting cap can be used.

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