The O-Ring, cataloged under National Stock Number 5331-00-004-5061, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems. Government technical data includes 3 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5331-00-004-5061 |
| Primary Part Number | 645411 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| Status | ACTIVE |
| Cross-Sectional Height | 0.171 INCHES MINIMUM AND 0.177 INCHES MAXIMUM IN |
| Center Hole Diameter | 0.397 INCHES MINIMUM AND 0.403 INCHES MAXIMUM IN |
| Material | RUBBER FLUOROCARBON CLASS FPM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 645411 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| Reference | Meaning |
|---|---|
| 645411 | 5/9 Secondary reference U.S. Government activity |
| AMS 7276G | 5/9 Secondary reference U.S. Government activity |
| AMS 7276G | 5/9 Secondary reference Sae International Dba Sae International |
| MILR83248ES | 5/9 Secondary reference Eriks B.v. |
NSN 5331-00-004-5061 is a O-Ring, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-004-5061 has 1 manufacturer part number on file: 645411 (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems).
1 possible match (shared part number, not a government interchangeability claim): 2835-01-095-4459. Verify interchangeability with system specifications before substitution.
Key specifications for 645411: Cross-Sectional Height: 0.171 INCHES MINIMUM AND 0.177 INCHES MAXIMUM IN; Center Hole Diameter: 0.397 INCHES MINIMUM AND 0.403 INCHES MAXIMUM IN; Material: RUBBER FLUOROCARBON CLASS FPM. 3 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.