The O-Ring, cataloged under National Stock Number 5331-00-394-7370, 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 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5331-00-394-7370 |
| Primary Part Number | AS568-905S383-70 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Parker-Hannifin Corp Div O-Ring Division |
| Status | ACTIVE |
| Temp Rating | -175.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.069 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN |
| Outside Diameter | 0.558 INCHES NOMINAL IN |
| Hardness Rating | 70.0 SHORE DUROMETER A NOMINAL |
| Center Hole Diameter | 0.409 INCHES MINIMUM AND 0.419 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 |
|---|---|
| AS568-905S383-70 | Parker-Hannifin Corp Div O-Ring Division (USA) |
| AS568-905-S32 | Federal-Mogul Corp Government Sales Dept (USA) |
| AS568-905R1131-70 | 4 M Co Inc Dba 4 M Co Inc Div Trelleborg Sealing Solutions Us Inc. (USA) |
| Reference | Meaning |
|---|---|
| BACP11K5 | 3/2 Design control — primary reference U.S. Government activity |
| AS568-905-S32 | C/1 Advisory reference — outside the item-of-supply concept Hutchinson Seal Corporation |
| 150701-05 | 5/1 Secondary reference U.S. Government activity |
| AS568-905TH006 | 5/2 Secondary reference U.S. Government activity |
| R1131-905 | 5/9 Secondary reference 4 M Company, Inc. Dba Porter Seal Company Use CAGE Code 1k407 for Cataloging |
| 3-905-S383-70 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 3-905S383-70 | 5/1 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| 1090-05 | 5/1 Secondary reference U.S. Government activity |
NSN 5331-00-394-7370 is a O-Ring, manufactured by Parker-Hannifin Corp Div O-Ring Division, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-394-7370 has 3 manufacturer part numbers on file: AS568-905S383-70 (Parker-Hannifin Corp Div O-Ring Division), AS568-905-S32 (Federal-Mogul Corp Government Sales Dept), AS568-905R1131-70 (4 M Co Inc Dba 4 M Co Inc Div Trelleborg Sealing Solutions Us Inc.).
1 possible match (shared part number, not a government interchangeability claim): 3020-01-344-6045. Verify interchangeability with system specifications before substitution.
Key specifications for AS568-905S383-70: Temp Rating: -175.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.069 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN; Outside Diameter: 0.558 INCHES NOMINAL 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.