The O-Ring, cataloged under National Stock Number 5331-01-368-9957, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Eaton Limited. Government technical data includes 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5331-01-368-9957 |
| Primary Part Number | 271084 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Eaton Limited |
| Status | ACTIVE |
| Cross-Sectional Height | 0.061 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN |
| Hardness Rating | 75.0 SHORE DUROMETER A MINIMUM AND 85.0 SHORE DUROMETER A MINIMUM |
| Specification/standard Data | 80205-NAS1602 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Center Hole Diameter | 0.296 INCHES MINIMUM AND 0.306 INCHES MAXIMUM IN |
| Material | RUBBER ETHYLENE-PROPYLENE CLASS EPM |
| 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 |
|---|---|
| 271084 | Eaton Limited (GBR) |
| Reference | Meaning |
|---|---|
| NAS1602 | 3/1 Design control — primary reference U.S. Government activity |
| NAS1602-903 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5331-01-368-9957 is a O-Ring, manufactured by Eaton Limited, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-368-9957 has 1 manufacturer part number on file: 271084 (Eaton Limited).
2 possible matches (shared part number, not a government interchangeability claim): 5331-01-369-9747, 5331-01-506-0205. Verify interchangeability with system specifications before substitution.
Key specifications for 271084: Cross-Sectional Height: 0.061 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN; Hardness Rating: 75.0 SHORE DUROMETER A MINIMUM AND 85.0 SHORE DUROMETER A MINIMUM; Specification/standard Data: 80205-NAS1602 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD; Special Features: TEMPERATURE MINUS 70 DEG TO PLUS 250/400 DEG F. RATINGS UP TO PLUS 250 DEF F ARE FOR CONTINUOUS OPERATING SERVICE,AND RATINGS ABOVE PLUS 250 DEG F AND UP TO 400 DEG F ARE FOR SHORT TERM OR INTERMITTENT SERVICE DEGF. 5 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.