The Cap,upper Piston, cataloged under National Stock Number 2995-00-076-4776, is classified within Federal Supply Class 2995 (Miscellaneous Engine Accessories, Aircraft) of the Engine Accessories group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 2 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2995-00-076-4776 |
| Primary Part Number | 3-50391-1 |
| Item Name | Cap,upper Piston |
| FSC / FSG | 2995 / 29 — Miscellaneous Engine Accessories, Aircraft |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| FSC Application Data | VALVE,STARTER DIVERTING AIR,ACFT ENGINE |
| General Characteristics Item Description | CRES,0.849 TO 0.859 IN. LG,2.570 IN. OD INCL 3 LUGS 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 |
|---|---|
| 3-50391-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 3-50391-1 | 5/9 Secondary reference Northrop Grumman Technical Services, Inc. Dba Defense Systems Sector |
| 3-50391-1 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
NSN 2995-00-076-4776 is a Cap,upper Piston, manufactured by Northrop Grumman Systems Corporation, classified under FSC 2995, Miscellaneous Engine Accessories, Aircraft. Status: active.
NSN 2995-00-076-4776 has 1 manufacturer part number on file: 3-50391-1 (Northrop Grumman Systems Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5999-01-059-0458. Verify interchangeability with system specifications before substitution.
Key specifications for 3-50391-1: FSC Application Data: VALVE,STARTER DIVERTING AIR,ACFT ENGINE; General Characteristics Item Description: CRES,0.849 TO 0.859 IN. LG,2.570 IN. OD INCL 3 LUGS IN; End Item Identification: 2995000664665 3-50327-503 VALVE. 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 2995-00-076-4776 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.