The O-Ring, cataloged under National Stock Number 5331-01-004-7982, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-004-7982 |
| Primary Part Number | HS4878-1 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Temp Rating | -65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.037 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN |
| Outside Diameter | 0.297 INCHES MINIMUM AND 0.319 INCHES MAXIMUM IN |
| Hardness Rating | 75.0 SHORE DUROMETER A NOMINAL |
| Elongation Percentage | 164 MAXIMUM |
| Center Hole Diameter | 0.223 INCHES MINIMUM AND 0.233 INCHES MAXIMUM IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| 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 |
|---|---|
| 5-194N304-75 | Parker-Hannifin Corp Div O-Ring Division (USA) |
| HS4878-1 PRIMARY | The Boeing Company (USA) |
| NM304 5-194 PRIMARY | Parker-Hannifin Corp Div O-Ring Division (USA) |
| Reference | Meaning |
|---|---|
| 5-194N304-75 | 5/9 Secondary reference U.S. Government activity |
| 5-194 N304-75 | 5/9 Secondary reference Parker Hannifin Gmbh O-Ring Division |
| N0304 5-194 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| 927C529P2 | 5/9 Secondary reference U.S. Government activity |
| 080-49800-78 | 3/2 Design control — primary reference U.S. Government activity |
| 5-194N756-75 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| HS4878-1 | 5/9 Secondary reference Mcdonnell Douglas Helicopter Co Inc |
NSN 5331-01-004-7982 is a O-Ring, manufactured by The Boeing Company, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-004-7982 has 3 manufacturer part numbers on file: 5-194N304-75 (Parker-Hannifin Corp Div O-Ring Division), HS4878-1 (The Boeing Company), NM304 5-194 (Parker-Hannifin Corp Div O-Ring Division).
2 possible matches (shared part number, not a government interchangeability claim): 5330-01-097-3637, 5331-01-182-5118. Verify interchangeability with system specifications before substitution.
Key specifications for HS4878-1: Temp Rating: -65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.037 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN; Outside Diameter: 0.297 INCHES MINIMUM AND 0.319 INCHES MAXIMUM IN; Hardness Rating: 75.0 SHORE DUROMETER A NOMINAL. 7 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.