To stabilize the weapon after release from the aircraft, a tail cone assembly is attached to the aft end of the cargo section. The tail cone assembly houses four, spring-actuated folding fins. The fins are spring-loaded to the open position and secured in the closed position during ground handling by a fin release-band assembly. The fin release band is secured in the closed position by a safety cotter pin and by the fin release wire. A    yellow    band    around  the  forward  end  of  the cargo  section  indicates  the  explosive  content  of  the weapon. The Mk 7 Mods 3, 4, and 6 bomb dispensers have the Mk 339 Mod 1 fuze, which provides the pilot with in-flight selection of the fuze function time. The Mk 7 Mod 4 bomb dispenser differs from the Mk  7  Mod  3  by  modifying  the  dispenser  and  giving interface  capabilities  with  a  wider  range  of  military aircraft. The Mk 7 Mod 6 bomb dispenser is the same as the Mk 7 Mod 3 except that the outside of the Mod 6 cargo   section   is   coated   with   a   thermal   protective coating  and  has  an  additional  yellow  band  around  the forward  end  of  the  cargo  section.  The  addition  of  the thermal coating increases the overall weight of the Mod 6 to 505 pounds. Mk 339 Mod 1 Mechanical Time Fuze The purpose of the Mk 339 Mod 1 mechanical time fuze  is  to  initiate  the  linear-shaped  charges  located  in the cargo section walls. 1-35 BOMB CLUSTER BOMB DISPENSER FUZE EXPLOSIVE PAYLOAD Mk 20 Mod 3 Mk 7 Mod 3 Mk  339  Mod  1 Mechanical Time Fuze 247  Mk  118  Mod  0  antitank bombs with Mk 1 Mod 0 fuzing system Mk 20 Mod 4 Mk 7 Mod 4 Mk  339  Mod  1 Mechanical Time Fuze 247  Mk  118  Mod  0  antitank bombs with Mk 1 Mod 0 fuzing system Mk 20 Mod 6 Mk  7  Mod  6 Thermally protected Mk  339  Mod  1 Mechanical Time Fuze 247  Mk  118  Mod  1  antitank bombs with Mk 1 Mod 1 fuzing system MJU-5/B Mk 7 Mod 3 Mk  339  Mod  1 Mechanical Time Fuze Chaff CBU-78/B  & B/B SUU-58/B Mk  339  Mod  1 Mechanical Time Fuze 45  BLU-91B  AT/AV  and  15 BLU-92/B AP CBU-78 B/B SUU-58/B FMU-140/B 45  BLU-91B  AT/AV  and  15 BLU-92/B AP CBU-99/B SUU-75/B Thermally protected Mk 339 Mod 1 247 Mk 118 Mod 0 bombs CBU-99A/B SUU-75A/B Thermally protected FMU-140/B 247 Mk 118 Mod 0 bombs CBU-100/B SUU-76/B Thermally protected Mk 339 Mod 1 247 Mk 118 Mod 0 bombs CBU-100A/B SUU-76A/B Thermally protected FMU-140/B 247 Mk 118 Mod 0 bombs Table 1-4.—Bomb Cluster Mk 20 Mods and CBU-99 and CBU-100 Configurations