The O-Ring, cataloged under National Stock Number 5331-00-255-5217, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5331-00-255-5217 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Status | ACTIVE |
| Temp Rating | -65.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN |
| Center Hole Diameter | 4.222 INCHES MINIMUM AND 4.252 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 |
| Reference | Meaning |
|---|---|
| NAS1611-156 | 3/2 Design control — primary reference U.S. Government activity |
| 2-156E515-80 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| NAS1613 | 3/1 Design control — primary reference U.S. Government activity |
| 298023-20 | C/1 Advisory reference — outside the item-of-supply concept Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 1298023-21 | 3/9 Design control — primary reference Parker-Hannifin Corp Div O-Ring Division |
| 1298023-21 | 5/9 Secondary reference Apple Rubber Products, Inc. Dba Apple Rubber Products Inc |
| 1298023-21 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5331-00-255-5217 is a O-Ring, classified under FSC 5331, O-ring. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5331-01-483-8233. Verify interchangeability with system specifications before substitution.
Key specifications for 5331-00-255-5217: Temp Rating: -65.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN; Center Hole Diameter: 4.222 INCHES MINIMUM AND 4.252 INCHES MAXIMUM IN; Material: RUBBER ETHYLENE-PROPYLENE CLASS EPM. 4 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.