National Stock Number
6640-01-642-2527
National Stock Number (NSN) 6640-01-642-2527, or NIIN 016422527, (test paper,hydrogen ion) was assigned February 19, 2015 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 2 manufacturer part numbers associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, one supplier is listed as an Active supplier for this NSN. Of the active suppliers, only one supplier is deemed design controlled or valid supply parts.
This part number is actively being procured by the US Government, with procurement history within the last 90 days. There have been 324 contracts issued for this part number, with 301 awards given. There is minimal competition for this NSN. The US Government has awarded contracts to 5 different suppliers. The last contract numbers awarded were: SPE2DH25V3442, SPE2DH25V3410, SPE2DH25V3341, SPE2DH25V3318, SPE2DH25V3195. The total value of the awarded contracts has been US$ 20,343.72.
This NSN is somewhat common among different platforms, belonging to 3 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 Mar 12, 2015, this NSN's acquisition method was noted as: Acquire, for the first time, directly from the actual manufacturer rather than the prime contractor who is not 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) 18297. [A CHEMICALLY-TREATED TEST PAPER USED WITH A COLOR CHART TO DETERMINE BY COLOR COMPARISON THE PH VALUE OF A LIQUID/SOLUTION. FOR ITEMS INCLUDING A COLOR CHART, SEE TEST PAPER AND COLOR CHART,PH. 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 6640016422527 does not contain precious metals.
This information was last updated on Jul 01, 2025.