The Penetrating Oil, cataloged under National Stock Number 9150-01-591-4281, is classified within Federal Supply Class 9150 (Oils and Greases: Cutting, Lubricating, and Hydraulic) of the Fuels, Lubricants, Oils, and Waxes group. The manufacturer of record is Federal Commercial Item Description Promulgated by General Services Administration Washington DC. Government technical data includes 6 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 9150-01-591-4281 |
| Primary Part Number | A-A-50493- A- I DR |
| Item Name | Penetrating Oil |
| FSC / FSG | 9150 / 91 — Oils and Greases: Cutting, Lubricating, and Hydraulic |
| Manufacturer | Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
| Status | ACTIVE |
| Maximum Pour Point | -40.0 FAHRENHEIT DEGF |
| Fatty Material Type | ANY ACCEPTABLE |
| Quantity Within Each Unit Package | 55.000 GALLONS |
| Viscosity at Rated Temp | 10.40 NOMINAL 100 DEG FAHRENHEIT |
| Environmental Attribute Code | PENETRATING LUBRICANTS - BIOBASED |
| Service Characteristics | CORROSION RESISTIVE AND OXIDATION RESISTANT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| A-A-50493- A- I DR | Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA) |
| Reference | Meaning |
|---|---|
| A-A-50493 - BIOBASED DR | 5/9 Secondary reference U.S. Government activity |
| A-A-50493 | 4/1 Identification reference Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
NSN 9150-01-591-4281 is a Penetrating Oil, manufactured by Federal Commercial Item Description Promulgated by General Services Administration Washington DC, classified under FSC 9150, Oils and Greases: Cutting, Lubricating, and Hydraulic. Status: active.
NSN 9150-01-591-4281 has 1 manufacturer part number on file: A-A-50493- A- I DR (Federal Commercial Item Description Promulgated by General Services Administration Washington DC).
2 possible matches (shared part number, not a government interchangeability claim): 9150-01-598-9606, 9150-01-690-3329. Verify interchangeability with system specifications before substitution.
Key specifications for A-A-50493- A- I DR: Maximum Pour Point: -40.0 FAHRENHEIT DEGF; Fatty Material Type: ANY ACCEPTABLE; Quantity Within Each Unit Package: 55.000 GALLONS; Viscosity at Rated Temp: 10.40 NOMINAL 100 DEG FAHRENHEIT. 6 specifications are 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.