The Cushion,seat Back,aircraft, cataloged under National Stock Number 1680-01-351-4545, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1680-01-351-4545 |
| Item Name | Cushion,seat Back,aircraft |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Status | ACTIVE |
| FSC Application Data | OBSERVER SEAT ASSEMBLY |
| Adjustability | NONADJUSTABLE |
| Seating Capacity | 1 |
| Spring | NOT INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 50161-1 | 3/9 Design control — primary reference Castle Industries Inc. of California Dba M.c. Gill |
| 20177 | 5/9 Secondary reference Castle Industries Inc. of California Dba M.c. Gill |
NSN 1680-01-351-4545 is a Cushion,seat Back,aircraft, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5130-01-578-1613. Verify interchangeability with system specifications before substitution.
Key specifications for 1680-01-351-4545: FSC Application Data: OBSERVER SEAT ASSEMBLY; Adjustability: NONADJUSTABLE; Seating Capacity: 1; End Item Identification: E-3A AIRCRAFT A. 4 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.