were packed in cardboard storage tubes in crates of 24 or 50. Fuzes were shipped separately in boxes containing 25 fuzes. MK3A2 The MK3A2 had a waterproof asphalt-impregnated fiberboard cylinder and its top and bottom were made from the same material. The top had a fuze well directly threaded in its center. It originally used the M6A4D fuze, which had a four to five second delay. This was later replaced with the updated M206 series fuze (currently using the M206A2), which was smokeless— and noiseless—burning and had a five-second delay. It contained an 8 oz. TNT charge. It can be identified by its cylinder, which is in two halves and is secured in the middle with a wide black band. The yellow lettering is printed directly on the surface of the grenade and reads "Grenade Hand - Offensive MK3A2 - TNT". The grenades weighed 0.96 lbs. each. They came packed in storage tubes in crates of 30 grenades. References FM 3-23.30 "Grenades and Pyrotechnic Signals". globalsecurity.org, 1 September 2000. Ch. 1, Sec. 1-8.b "Special-Purpose Hand Grenades/Offensive". Retrieved on 26 May 2011 Concussion grenades Hand grenades of the United States World War I infantry weapons of the United States World War II infantry weapons of the United States