TM   5-2815-241-34&P APPENDIX  B EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST Section   I.   INTRODUCTION B-1. SCOPE. This  appendix  lists  expendable/durable  supplies  and  materials  you  will  need  to  operate  and  maintain  the semitrailers.  This  listing  is  for  informational  purposes  only  and  is  not  authority  to  requisition  the  listed  items.  These items are authorized to you by CTA 50-970, Expendable/Durable Items (Except Medical, Class V, Repair Parts, and Heraldic  Items),  or  CTA  8-100,  Army  Medical  Department  Expendable/Durable  Items. B-2. EXPLANATION  OF  COLUMNS. a. Column  (1),  Item  Number.  This  number  is  assigned  to  the  entry  in  the  listing  and  is  referenced  in  the “Initial  Setup”  of  maintenance  paragraphs  or  narrative  instructions  to  identify  the  material  needed  (e.g.,  Dry  cleaning solvent,  Item  16,  Appendix  B). b. Column  (2),  Level.  This  column  identifies  the  lowest  level  of  maintenance  that  requires  the  listed  item. C  -  Operator/Crew O   -   Organizational   Maintenance F  -  Direct  Support  Maintenance H   -General   Support   Maintenance c. Column  (3),  National  Stock  Number.  This is the National Stock Number assigned to the item. Use it to request  or  requisition  the  item. d. Column  (4),  Description.  Indicates  the  Federal  item  name  and,  if  required,  a  description  to  identify  the item.  me  last  line  for  each  item  indicates  the  Commercial  and  Government  Entity  (CAGE)  Code  in  parentheses followed  by  the  part  number,  if  applicable. e.  Column  (5),  Unit  of  Measure  (U/M).  Indicates  the  measure  used  in  performing  the  actual  maintenance function.  This  measure  is  expressed  by  a  two-character  alphabetical  abbreviation  (e.g.,  ea,  in.,  pr).  If  the  unit  of measure  differs  from  the  unit  of  issue,  requisition  the  lowest  unit  of  issue  that  will  satisfy  your  requirements. Change  1 B - 1