The Piston,reservoir, cataloged under National Stock Number 1680-00-562-5247, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. The manufacturer of record is United Aeronautical Corporation Dba United Aeronautical Corp. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1680-00-562-5247 |
| Primary Part Number | 3546979 |
| Item Name | Piston,reservoir |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Manufacturer | United Aeronautical Corporation Dba United Aeronautical Corp |
| Status | ACTIVE |
| General Characteristics Item Description | CRES; 1.125 IN. DIA IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 3546979 PRIMARY | United Aeronautical Corporation Dba United Aeronautical Corp (USA) |
| Reference | Meaning |
|---|---|
| 3546979 | 5/2 Secondary reference U.S. Government activity |
NSN 1680-00-562-5247 is a Piston,reservoir, manufactured by United Aeronautical Corporation Dba United Aeronautical Corp, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
NSN 1680-00-562-5247 has 1 manufacturer part number on file: 3546979 (United Aeronautical Corporation Dba United Aeronautical Corp).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-135-0650. Verify interchangeability with system specifications before substitution.
Key specifications for 3546979: General Characteristics Item Description: CRES; 1.125 IN. DIA IN. 1 specification is 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 1680-00-562-5247 has DEMIL Code B. 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.