The Disc,friction, cataloged under National Stock Number 1680-01-631-2009, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. The manufacturer of record is Northrop Grumman Systems Corporation. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Disc,friction |
| FSC / FSG | 1680 — Miscellaneous Aircraft Accessories and Components (FSG 16) |
| Manufacturers | Northrop Grumman Systems Corporation (CAGE 26512); Northrop Grumman Technical Services, Inc. (CAGE 59U82) |
| Parameter | Value |
|---|---|
| NSN | 1680-01-631-2009 |
| Primary Part Number | 4L5471-3 |
| Item Name | Disc,friction |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4L5471-3 | Northrop Grumman Systems Corporation (USA) |
| 4L5471-3 | Northrop Grumman Technical Services, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 4L5471-3 | 3/2 Design control — primary reference U.S. Government activity |
| 4L5471 | D/9 Drawing number reference only U.S. Government activity |
| 4L5471-3 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| 4L5471-3 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
NSN 1680-01-631-2009 is a Disc,friction, manufactured by Northrop Grumman Systems Corporation, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
NSN 1680-01-631-2009 has 2 manufacturer part numbers on file: 4L5471-3 (Northrop Grumman Systems Corporation), 4L5471-3 (Northrop Grumman Technical Services, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 1680-01-632-2082. Verify interchangeability with system specifications before substitution.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 1680-01-631-2009 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.