SECTION I TM 53810-232-20P D - Depot is the lowest level that can do complete repair of the item. L - Specialized repair activity is the lowest level that can do complete repair of the item. Z - Nonreparable. No repair is authorized. B - No repair is authorized. (No parts or special tools are authorized for the maintenance of a "B" coded item). However,  the item may be reconditioned by adjusting,  lubrication,  etc.,  at the user level. (3) Recoverability Code. Recoverability codes are assigned to items to indicate the disposition action on unserviceable items. The recoverability code is entered in the fifth position of the SMR Code as follows: Code Application/Explanation Z- Nonreparable item. When  unserviceable,   condemn and dispose of the item at the level of maintenance shown in 3d position of SMR Code. O - Reparable  item.  When  uneconomically reparable,  condemn and dispose of the item at unit maintenance or aviation unit level. F - Reparable  item.  When  uneconomically reparable,  condemn and dispose of the item at the intermediate direct support or aviation intermediate level. H- Reparable  item.  When  uneconomically reparable,  condemn and dispose of the item at the intermediate general support level. D - Reparable item. When beyond lower level repair capability,  return to depot. Condemnation and disposal of item not authorized below depot level. L - Reparable item. Condemnation and disposal of item not authorized below specialized repair activity (SRA). A - Item requires special handling or condemnation procedures  because  of specific reasons (e.g.,   precious metal content,  high dollar value, critical   material,  or hazardous material). Refer to appropriate manuals/directives for specific instructions c. FSCM (Column (3)). The Federal Supply Code for Manufacturer (FSCM) is a 5-digit numeric code which is used to identify the manufacturer,  distributor,  or Government agency,  etc.,  that supplies the item 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 form 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) Physical   security   classification.   Not applicable (3) Items that are included in kits and sets are listed below the name of the kit or set on Figure KIT. (4) Spare/repair parts that make up and 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). Not applicable. (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 equipment 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   4. Explanation of Columns (Section IV). a. NATIONAL STOCK NUMBER (NSN) INDEX 3