The Support,sc, cataloged under National Stock Number 2840-00-018-4492, is classified within Federal Supply Class 2840 (Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2840-00-018-4492 |
| Primary Part Number | 505683 |
| Item Name | Support,sc |
| FSC / FSG | 2840 / 28 — Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| 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 |
|---|---|
| 505683 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 505683 | Crain Enterprises Inc (USA) |
| 505683 | Spellman High-Voltage Electronics Corporation Dba Spellman High-Voltage Electronics Corp (USA) |
| Reference | Meaning |
|---|---|
| 505683 | 5/9 Secondary reference Emhart Industries Inc Corbin Hose Clamp Hardware Div |
| 505683 | 5/9 Secondary reference U.S. Government activity |
NSN 2840-00-018-4492 is a Support,sc, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 2840, Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components. Status: active.
NSN 2840-00-018-4492 has 3 manufacturer part numbers on file: 505683 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 505683 (Crain Enterprises Inc), 505683 (Spellman High-Voltage Electronics Corporation Dba Spellman High-Voltage Electronics Corp).
1 possible match (shared part number, not a government interchangeability claim): 3040-00-394-3058. Verify interchangeability with system specifications before substitution.
Key specifications for 505683: End Item Identification: ENG J-57. 0 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 2840-00-018-4492 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.