Code 1,’.ypiunation parts   which   are   subject   to   special   handling   and are   issued   on   an   exchange   basis.   Such   repair parts   are   normally   repaired   or   overhauled   at depot    maintenance    activities. U Applied   to   repair   parts   specifically   selected   for   sal- vage   by   reclamation   units   because   of   precious metal   content,   critical   materials,   or   high   dollar value   reusable   casings,   or   castings. b.  Federal  Stock  Number,  Column  (2).   This column   indicates   the   Federal   stock   number   as- signed   to   the   item   and   will   be   used   for   requisi- tioning   purposes. c. Description,  Column  (9).   This  column  indi- cates   the   Federal   item   name   and   any   additional description   of   the   item   required.   The   abbrevia- tion   “w/e”,   when   used   as   a   part   of   the   nomen- clature,   indicates   the   Federal   stock   number   in- cludes   all   armament,   equipment,   accessories,   and repair   parts   issued   with   the   item.   A   part   number or   other   reference   number   is   preceded   by   the applicable  five-digit  Federal  supply  code  for  man- ufacturers   in   parenthesis.   Repair   parts   quantities included  in  kits,  sets,  and  assemblies  are  shown in  front  of  the  repair  part  name. d.  Unit  of  Measure  (U/M),  Column  (4).   A two-character   alphabetic   abbreviation   indicating the  amount  or  quantity  of  the  item  upon  which the  allowances  are  based,  e.g.,  ft,  ea,  pr,  etc. e. Quantity  Incorporated  In  Unit,  Column  (5). This   column   indicates   the   quantity   of   the   item used   in   the   functional   group   or   the   assembly group.  A  “V”  appearing  in  this  column  in  lieu  of a   quantity   indicates   that   a   definite   quantity   can- not  be  indicated  (e.g.,  shims,  spacers,  etc.). f.  Quantity  Furnished  With  Equipment,   Col- umn  (6).  This   column   indicates   the   quantity   of an  item  furnished  with  the  equipment. g. Illustration,  Column  (7).   This  column  is  di- vided  as  follows: (1)  Figure  Number,  Column   (7)  (a),  Indi- cates   the   figure   number   of   the   illustration   in which  the  item  is  shown. the   callout   number   used   to   reference   the   item   in the   illustration. B-4.  Abbreviations e a - - - - - - - - -     - - - - - - - - each B-5.  Federal  Supply  Code  for    Manufacturers Code Manufwturer 97403  ----------  Engineering   Research   and   Development Laboratories,   Fort   Belvoir,   Va. (1) SMR Code PC PC PC PC (2) F4ner:lr~k 7520-559-9618 Section  II.   BASIC ISSUE ITEMS (3) Description Ref  No.  &  mfr usable code on  code BASIC   ISSUE  ITEMS,  MANUFACTURER OR  DEPOT    INSTALLED CASE:   operation   and    Maintenance   publica- tions,   cotton,  duck,   water  repellent,  mildew resistant,    MIL-B-11743B OPERATOR,      ORGANIZATIONAL,       DI- RECT    SUPPORT,     AND    GENERAL SUPPORT   MAINTENANCE   MANUAL TM   5-4120-312-14 PANEL,   BLOCK    OFF:   electrical   receptacle (97403)   13211E83   92 RECEPTACLE      ELECTRICAL:      (97403) MS3106R22-22-S ATTENUATOR:     sound    (97403) 13211E3798 (4) Unit    of mess ea ea ea ea (5) Qty IVC  in unit 1 1 1 (6) Qty furn with equip 1 1 1 1 (7) Illustration (A) Fig No. (B) Item No. B-2