TM 10-8340-220-23P stockage are identified with an asterisk in the allowance column. (2)  The  quantitative  allowances  for  DS  level  of maintenance  will  represent  initial  stockage  for  a  30-day period for the number of equipments supported. (3)  To  determine  allowances   when   supporting more  than  100  of  these  equipments:  First,  divide  the number  of  equipments  supported  by  100  by  moving  the decimal two places left; second, multiply the result by the quantity    in    the    51-100    density    column.        Example, authorized  allowance  for  51-100  equipments  is  40;;  for 150 equipments multiply 40 by 1.50 or 60 parts required. h.        1-Year    Allowance    Per    100    Equipments/ Contingency Planning Purposes.  Indicates opposite the first  appearance  of  each  item  the  total  quantity  required for distribution and contingency planning purposes.  The range of items indicates total quantities of all authorized items  required  to  provide  for  adequate  support  of  100 equipments  for  one  year.    Subsequent  appearances  of the    same    item    will    have    the    letters    "REF"    in    the allowance column. i.  Illustration.  This column is divided as follows. (1) Figure number.   Indicates  the  figure  number of the illustration in which the item is shown. (2)  Item  number.    Indicates  the  callout  number used to reference the item in the illustration. 4. Special Information a.    Repair  parts  mortality  has  been  based  on 7,500 hours operation per year. b.  Parts which require manufacture or assembly at  a  category  higher  than  that  authorized  for  installation will indicate in the source column the higher category. c.    The  following  publication  pertains  to  the  tent and   its   components:   TM   10-269   General   Repair   for Canvas and Webbing d.    The  same  illustrations  are  used  to  illustrate the    repair    parts    and    special    tools    listed    in    both organizational  maintenance  section  and  direct  support and depot maintenance section. 5. How to Locate Repair Parts a.      When  Federal  stock  number  or  reference number   is   unknown:   (1)   First.      Using   the   table   of contents determine the assembly group within which the repair part belongs.  This is necessary since illustrations are   prepared   for   assembly   groups,   and   listings   are divided into the same groups. (2)  Second.    Find  the  illustration  covering  the assembly 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 Listings, find the assembly group to which the repair part belongs and locate  the  illustration  figure  and  item  number  noted  on the illustration. b.    When  Federal  stock  number  or  reference  is known: (1)   First.      Using   the   Index   of   Federal   Stock Numbers   and   Reference   Numbers   find   the   pertinent Federal stock number or reference number. This index is in ascending FSN sequence  followed  by  a list  of  reference  numbers  in  alpha-numeric  sequence, cross-referenced   to   the   illustration   figure   number   and item number. (2) Second.  Using the Repair Parts Listing, find the assembly group of the repair part and the Illustration figure number and item number referenced in  the  Index of Federal Stock Numbers and Reference Numbers. c.  When the Federal stock number or reference number is known and the repair part is not illustrated: (1)   First.      Using   the   Index   of   Federal   Stock Numbers   and   Reference   Numbers   find   the   pertinent Federal stock number or reference number in the section titled  Items  not  Illustrated  and  note  the  group  number. This section is in ascending FSN sequence followed by a list  of  reference  numbers  in  alpha-numeric  sequence, cross-referenced to assembly group number. (2) Second.  Using the Table of Contents, locate the assembly group number and page number. (3)  Third.    Using  the  applicable  group  number and  page  number,  locate  the  pertinent  stock  number  or reference  number  in  the   Repair   Parts   Listing.      Items which   are   not   illustrated   are   listed   at   the   end   of   the assembly group to which they belong. 6. Abbreviations C/O  -------------------------  consist of dia  --------------------------  diameter ft -----------------------------  foot (feet) in  ----------------------------  inch (es) lg  ----------------------------  length No ---------------------------  number(s) thk---------------------------  thick (ness) 3