TM   9-2520-272-34&P d. PART  NUMBER  (Column  (4)).  Indicates   the   primary   number   used   by   the manufacturer   (individual,   company,   firm,   corporation,   or   Government   activity),   which   controls the  design  and  characteristics  of  the  item  by  means  of  its  engineering  drawings,  specifications, standards,   and   inspection   requirements   to   identify   an   item   or   range   of   items NOTE When  you  use  a  NSN  to  requisition  an  item,  the  item  you  receive  may have   a   different   part   number   from   the   part   ordered. e. DESCRIPTION   AND   USABLE   ON   CODE   (UOC)   (Column   (5)).   This   column   includes the   following   information: (1) The   Federal   item   name   and,   when   required,   a   minimum   description   to identify   the   item. (2) The   physical   security   classification   of   the   item   is   indicated   by   the parenthetical   entry   (insert   applicable   physical   security   classification   abbreviation,   e.g.,   Phy Sec  C1  (C)  -  Confidential!,  Phy  Sec  C1  (S)  -  Secret,  Phy  Sec  C1  (T)  -  TOP  secret). (3) Items   that   are   included   in   kits   and   sets   are   listed   below   the   name   of   the   kit or   set. (4) Spare/repair  parts  that  make  up  an  assembled  item  are  listed  immediately following   the   assembled   item   line   entry. (5) Part   numbers   for   bulk   materials   are   referenced   in   this   column   in   the   line item   entry   for   the   item   to   be   manufactured/fabricated. (6) When  the  item  is  not  used  with  all  serial  numbers  of  the  same  model,  the effective   serial   numbers   are   shown   on   the   last   line(s)   of   the   description   (before   UOC). (7) The   usable   on   code,   when   applicable   (see   paragraph   5,   Special   information). (8) In  the  Special  Tools  List  section,  the  basis  of  issue  (BOI)  appears  as  the  last line(s)   in   the   entry   for   each   special   tool,   special   TMDE,   and   other   special   support   equipment. When   density   of   equipments   supported   exceeds   density   spread   indicated   in   the   basis   of   issue, the   total   authorization   is   increased   proportionately. (9) The  statement  “END  OF  FIGURE”  appears  just  below  the  last  item description   in   Column   5   for   a   given   figure   in   both   Section   II   and   Section   III. f. QTY   (Column   (6)).   The  QTY  (quantity  per  figure  column)  indicates  the  quantity  of the   item   used   in   the   breakout   shown   on   the   illustration   figure,   which   is   prepared   for   a functional  group,  subfunctional  group,  or  an  assembly. A   “V”   appearing   in   this   column   in   lieu of   a   quantity   indicates   that   the   quantity   is   variable   and   the   quantity   may   vary   from application   to   application. B-6