Classification (FSC) that groups similar items into classes. The last 9 digits of the NSN is the National Item Identification Number (NIIN). The first 2 digits of the NIIN identifies the NATO country that cataloged the item, and the last 7 digits identifies the item. As pointed out above, NSN numbers provide you with the federal class of the item (first 4 digits), what country cataloged the item (digits 5 and 6). and the item identification number (last 7 digits). Part III of the COSAL is the section used to cross- reference manufacturer’s part numbers to NSNs. REPAIR PARTS CONTROL Each  maintenance  department  is  required  to maintain control over repair parts. One of the biggest problems in some maintenance programs is the control of direct turnover (DTO) repair parts. DTO parts are those ordered for direct turnover to the user. For DTO parts to be complete and accurate, all NAVSUP Form 1250s for NIS and NC repair parts must pass through the cost control clerk and the DTO clerk before  being  submitted  to  the  supply  office.  The  supply office maintains current procurement and shipping status for items on order. When requesting the status of a requisition from supply, DTO clerks must be able to identify,  by  requisition  number,  the  procurement document they are interested in. Accurate DTO parts records  accomplish  this  and  allow  the  cost  control  clerk to identify the USN-number of the equipment each part was ordered for. The DTO repair parts status keeping system   provides   excellent   accountability   with minimum effort. This system consists of two separate records designed to be used together: the DTO log and the repair parts summary sheets. DTO Log The DTO log (fig. 1-17) is a sequential record and proof of order for all NAVSUP Form 1250-1/-2 requests for NIS/NC/Non-NSN requirements submitted to the repair parts storeroom. It is maintained in such a way that the last NAVSUP Form 1250 entered is the last parts request submitted to the supply office. This tells the DTO clerk when the requisition was submitted to supply.  Normally,  supply  should  order  priority  "A" (NORS) requisitions within 24 hours and priority "B" and   "C"   requisitions   within   7   days. After accomplishing  all  ordering  actions  and  issuing  a procurement document, supply enters the requisition number in block "B" of a NAVSUP Form 1250-1 or block "I" of a NAVSUP Form 1250-2. The pink copy is returned   to   the   repair   parts   storeroom   where outstanding requisition data is posted to stock record cards for NIS items. The yellow copy is returned to the cost control office to log the requisition number in the DTO log. The yellow copy of NAVSUP Form 1250 is retained as proof of order and maintained with the repair parts summary sheet in the DTO files. The DTO log provides a cross-index between the requisition number, the department order number, and the USN number. This  cross-reference  allows  the  DTO  clerk  to  determine the appropriate USN number for which the part was ordered. This is invaluable for follow-up actions in the event of lost or misfiled requisitions, lost or missing shipping   documents,   partial   or   duplicate   parts shipments,  and  so  forth. The columns required to maintain an effective DTO log are listed and explained below. DATE—The date NAVSUP Form 1250 was submitted to supply. It is indicated by the Julian date:  For  example,  December  12,  1996,  is written  6347. DEPARTMENT  ORDER  NUMBER—Internal control number assigned to each NAVSUP Form 1250 submitted to supply, numbered in sequence starting  with  0001. PM   GROUP—The   PM   group   that   the appropriate   USN-number   equipment   is assigned. USN  NUMBER—Identifies  the  vehicle  for which the part was ordered. NSN/PART  NUMBER—The  NSN  or  part number of the ordered item. ITEM—Nomenclature  or  noun  name  of  the  item ordered. UNIT PRICE—The price of a single item. QUANTITY—Total number of items ordered. PRIORITY—Urgency-of-need Designator (A, B, or C). NC/NIS—Provides   ready   information   on whether an item is Not Carried or Not In Stock. REQUISITION  NUMBER—Entered  when  the yellow copy is returned from supply. All supply office documents are tiled by this number. 1-24