The Liner,vertical Hing, cataloged under National Stock Number 1680-01-481-3977, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 1680-01-481-3977 |
| Item Name | Liner,vertical Hing |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Status | ACTIVE |
| Overall Diameter | 2.757 INCHES MINIMUM AND 2.767 INCHES MAXIMUM IN |
| Material | STEEL |
| 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 |
| Reference | Meaning |
|---|---|
| 41923-1 | 3/2 Design control — primary reference U.S. Government activity |
| 41923 | 5/9 Secondary reference U.S. Government activity |
NSN 1680-01-481-3977 is a Liner,vertical Hing, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 1680-01-481-4481. Verify interchangeability with system specifications before substitution.
Key specifications for 1680-01-481-3977: Overall Diameter: 2.757 INCHES MINIMUM AND 2.767 INCHES MAXIMUM IN; Overall Length: 4.275 INCHES MINIMUM AND 4.280 INCHES MAXIMUM IN; Special Features: SLOT IS .435; End Item Identification: HELICOPTER, CH-53A/D/E A. 2 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.
NSN 1680-01-481-3977 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.