The Water Indicating Paste, cataloged under National Stock Number 6850-01-690-5644, is classified within Federal Supply Class 6850 (Miscellaneous Chemical Specialties) of the Chemicals and Chemical Products group. The manufacturer of record is Dumbo Defense Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6850-01-690-5644 |
| Primary Part Number | WT25 TU |
| Item Name | Water Indicating Paste |
| FSC / FSG | 6850 / 68 — Miscellaneous Chemical Specialties |
| Manufacturer | Dumbo Defense Inc |
| Status | ACTIVE |
| Quantity Within Each Unit Package | 2.50 FLUID OUNCES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| WT25 TU PRIMARY | Dumbo Defense Inc (USA) |
| Reference | Meaning |
|---|---|
| WT25 | 5/2 Secondary reference U.S. Government activity |
| WT25 | 3/9 Design control — primary reference Federal Process Corporation |
NSN 6850-01-690-5644 is a Water Indicating Paste, manufactured by Dumbo Defense Inc, classified under FSC 6850, Miscellaneous Chemical Specialties. Status: active.
NSN 6850-01-690-5644 has 1 manufacturer part number on file: WT25 TU (Dumbo Defense Inc).
2 possible matches (shared part number, not a government interchangeability claim): 6850-01-691-2763, 4925-01-719-1935. Verify interchangeability with system specifications before substitution.
Key specifications for WT25 TU: Quantity Within Each Unit Package: 2.50 FLUID OUNCES; Special Features: PHYSICAL FORM: VISCOUS PASTE; COLOR: MUSTARD YELLOW; ODORLESS; FLASH POINT: 350.00 DEG. F.; SPECIFIC GRAVITY: 1.45; SLIGHTLY SOLUBLE; KINEMATIC VISCOSITY: 30,000,000.00 CST; AVOID HEAT ABOVE 140.00 DEG. F.; INCOMPATIBLE MATERIALS: STRONG ACIDS AND HALOGENATED HYDROCARBONS;; Part Name Assigned by Controlling Agency: GASOILA REGULAR WATER FINDING PASTE; End Item Identification: 4930-01-113-9173. 1 specification is documented in the U.S. Government catalog.
Hazardous per DLA record (HMIC Y). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.