The Filtering Disk,fluid, cataloged under National Stock Number 2940-01-056-6687, is classified within Federal Supply Class 2940 (Engine Air and Oil Filters, Strainers, and Cleaners, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Honeywell International Inc. Div Aerospace - Torrance. Government technical data includes 7 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2940-01-056-6687 |
| Primary Part Number | 581978-2 |
| Item Name | Filtering Disk,fluid |
| FSC / FSG | 2940 / 29 — Engine Air and Oil Filters, Strainers, and Cleaners, Nonaircraft |
| Manufacturer | Honeywell International Inc. Div Aerospace - Torrance |
| Status | ACTIVE |
| Body Diameter | 2.540 INCHES MINIMUM AND 2.550 INCHES MAXIMUM IN |
| FSC Application Data | GEARBOX,ACCESSORY DRIVE,TURBINE ENGINE |
| Design Type | REUSABLE |
| Style Designator | ROUND (BASICALLY FLAT) |
| Media for Which Designed | FUEL/OIL, HYDROCARBON |
| Material | NICKEL BODY |
| Body Thickness | 0.020 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 581978-2 PRIMARY | Honeywell International Inc. Div Aerospace - Torrance (USA) |
NSN 2940-01-056-6687 is a Filtering Disk,fluid, manufactured by Honeywell International Inc. Div Aerospace - Torrance, classified under FSC 2940, Engine Air and Oil Filters, Strainers, and Cleaners, Nonaircraft. Status: active.
NSN 2940-01-056-6687 has 1 manufacturer part number on file: 581978-2 (Honeywell International Inc. Div Aerospace - Torrance).
Key specifications for 581978-2: Body Diameter: 2.540 INCHES MINIMUM AND 2.550 INCHES MAXIMUM IN; FSC Application Data: GEARBOX,ACCESSORY DRIVE,TURBINE ENGINE; Design Type: REUSABLE; Style Designator: ROUND (BASICALLY FLAT). 7 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.