The 20-lb Frag Bomb AN-M41A1 is constructed of spirally wound wire and cast steel nose and tail pieces. A seamless steel inner tube is threaded to the nose and tail piece to form the base for the spiral wound wire. The fin assembly is made of four rectangular sheet steel vanes welded to a 1-inch diameter pipe. The threaded end of the pipe is secured to the base filling plug. The nose section of the bomb is threaded to receive an impact fuze. At the center of gravity, a U-shaped eye- bolt of steel is welded to the bomb case for horizontal suspension; an eyebolt is welded to the tail for vertical suspension. Fragmentation Bomb A.N-M41 is issued only in cluster form. Approximately 13 percent of the complete weight of the bomb is explosive filler AM 50-50 or TNT. (https://bulletpicker.com/_library.html ) (OP 1280, Aircraft Bombs.pdf)
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