National Stock Number
6640-00-442-9025
National Stock Number (NSN) 6640-00-442-9025, or NIIN 004429025, (test paper and color chart,ph) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 6 manufacturer part numbers associated with this NSN. 5 of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 6 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, only one supplier is deemed design controlled or valid supply parts.
This part number has been procured by the US Government within the last year, but shows no recent (last 90 days) procurement activity. There have been 116 contracts issued for this part number, with 111 awards given. There is heavy competition for this NSN. The US Government has awarded contracts to 12 different suppliers. The last contract numbers awarded were: SPE2DS25V038Z, SPE2DS25V033X, SPE2DS25V5493, SPE2DS25V4769, SPE2DS25V4166. The total value of the awarded contracts has been US$ 6,552.14.
This NSN is somewhat common among different platforms, belonging to 7 different weapons systems.
This national stock number is in high demand. The demand for this NSN originated from less than 5 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Dec 02, 2006, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. This part is a commercial/non-developmental/off-the-shelf-item. Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 50880. [A GROUP OF ITEMS DESIGNED FOR DETERMINING HYDROGEN ION CONCENTRATION OF A LIQUID/SOLUTION, COMPRISED OF TEST PAPER,HYDROGEN ION AND AT LEAST ONE COLOR CHART. EXCLUDES LITMUS PAPER.]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no information in the HMIRS; however, the NSN is in an FSC in Table II of Federal Standard 313 and an MSDS may be required by the user. The requirement for an MSDS is dependent on a hazard determination of the supplier or the intended end use of the product. NSN 6640004429025 does not contain precious metals.
This information was last updated on Aug 01, 2025.