TM 5-6115-590-20P c.  National Stock Number.  Indicates the National Stock  Number  assigned  to  the  item  and  will  be  used  for requisitioning purposes. d.    Part  Number.    Indicates  the  primary  number used  by  the  manufacturer  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 a stock numbered item is requisitioned, the repair part received may have a different part number than the part being replaced. e.      Federal   Supply   Code   for   Manufacturer (FSCM).  The FSCM is a 5-digit numeric code listed in SB 708-42    which    is    used    to    identify    the    manufacturer, distributor, or Government agency, etc. f.    Description.    Indicates  the  Federal  item  name and,  if  required,  a  minimum  description  to  identify  the item.    Items  that  are  included  in  kits  and  sets  are  listed below the name of the kit or set with the quantity of each item in the kit or set indicated in the quantity incorporated in unit column.  When the part to be used differs between serial  numbers  of  the  same  model,  the  effective  serial numbers are shown as the last line of the description.  In the   Special   Tools   List,   the   initial   basis   of   issue   (BOI) appears as the last line in the entry for each special tool, TMDE,    and    support    equipment.        When    density    of equipments  supported  exceeds  density  spread  indicated in  the  basis  of  issue,  the  total  authorization  is  increased accordingly. g.  Unit of Measure (U/M).  Indicates the standard of   the   basic   quantity   of   the   listed   items   as   used   in performing    the    actual    maintenance    function.        This measure   is   expressed   by   a   two-character   alphabetical abbreviation (e. g.  , ea, in, pr, etc.  ).  When the unit of measure  differs  from  the  unit  of  issue,  the  lowest  unit  of issue that will satisfy the required units of measure will be requisitioned. h.    Quantity  Incorporated  in  Unit.    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 no specific quantity is applicable, (e. g.  , shims, spacers, etc.  ). 4.  Special Information. a.  Repair parts kits and gasket sets appear as the last entries in the repair parts listing for the figure in which its parts are listed as repair parts or are listed at the end of  the  repair  parts  listing  for  the  last  figure  containing parts of the kit. b.  The following publications pertain to power plant and its components. TM 5-6115-590-12 Operator   and  Organizational Maintenance Manual TM 5-6115-590-34 Direct Support and General Support Maintenance Manual DMWR 5-6115-590 Depot Maintenance Work Requirements TM 5-6115-590-34-P Direct and General Support Maintenance Repair Parts and Special Tools List LO 5-6115-590-12 Lubrication Order 5.  How to Locate Repair Parts. a.  When National Stock Number or Part Number is Unknown: (1)    First.        Using    the    table    of    contents, determine the functional group within which the repair part belongs.        This    is    necessary    since    illustrations    are prepared  for  functional  groups,  and  listings  are  divided into the same groups. (2) Second.  Find the illustration covering the functional group to which the repair part belongs. (3)   Third.      Identify   the   repair   part   on   the illustration    and    note    the    illustration    figure    and    item number of the repair part. (4) Fourth.  Using the repair Parts Listing, find the figure and item number noted on the illustration. b.  When National Stock Number or Part Number is Known. (1)  First.    Using  the  Index  of  National  Stock Numbers  and  Part  Numbers,  find  the  pertinent  National stock number or part number.  This index is in ascending NIIN   sequence   followed   by   a   list   of   part   numbers   in ascending   alphanumeric   sequence,   cross-referenced   to the illustration figure number and item number. (2) Second.  After finding the figure and item number,  locate  the  figure  and  item  number  in  the  repair parts list. 3