The O-Ring, cataloged under National Stock Number 5331-00-558-1326, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Parker-Hannifin Corp Div O-Ring Division. Government technical data includes 6 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5331-00-558-1326 |
| Primary Part Number | 3-903S604-70 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Parker-Hannifin Corp Div O-Ring Division |
| Status | ACTIVE |
| Temp Rating | -65.0 FAHRENHEIT AND 450.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.061 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN |
| Outside Diameter | 0.418 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN |
| Hardness Rating | 70.0 SHORE DUROMETER A NOMINAL |
| Center Hole Diameter | 0.296 INCHES MINIMUM AND 0.306 INCHES MAXIMUM IN |
| Material | RUBBER SILICONE CLASS Q |
| 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 |
|---|---|
| 3-903S604-70 PRIMARY | Parker-Hannifin Corp Div O-Ring Division (USA) |
| Reference | Meaning |
|---|---|
| A-A-59588 | 5/9 Secondary reference Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
| 5331PL1801690 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| AS568-903 | 5/9 Secondary reference U.S. Government activity |
| A-A59588-2A70 | 4/1 Identification reference Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
| 3-903S604-7 | 5/9 Secondary reference U.S. Government activity |
| AS568B-903 | 5/9 Secondary reference U.S. Government activity |
| 3-903 AMS3304 | 5/9 Secondary reference Motion & Flow Control Products, Inc. Dba Controlled Motion Solutions |
| 3-903S604-7 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| AS568-903 | 3/1 Design control — primary reference Sae International Dba Sae International |
NSN 5331-00-558-1326 is a O-Ring, manufactured by Parker-Hannifin Corp Div O-Ring Division, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-558-1326 has 1 manufacturer part number on file: 3-903S604-70 (Parker-Hannifin Corp Div O-Ring Division).
2 possible matches (shared part number, not a government interchangeability claim): 5331-01-170-9114, 5331-01-441-4143. Verify interchangeability with system specifications before substitution.
Key specifications for 3-903S604-70: Temp Rating: -65.0 FAHRENHEIT AND 450.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.061 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN; Outside Diameter: 0.418 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN; Hardness Rating: 70.0 SHORE DUROMETER A NOMINAL. 6 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.