The O-Ring, cataloged under National Stock Number 5331-00-221-6128, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Hamilton Sundstrand Corporation Dba Collins Aerospace. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 12 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-221-6128 |
| Primary Part Number | MS9386-012 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| Temp Rating | -85.0 FAHRENHEIT AND 500.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN |
| Outside Diameter | 0.504 INCHES NOMINAL IN |
| Hardness Rating | 75.0 SHORE DUROMETER A NOMINAL |
| Elongation Percentage | 125 MAXIMUM |
| Center Hole Diameter | 0.359 INCHES MINIMUM AND 0.369 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 | F |
| Part Number | Manufacturer |
|---|---|
| MS9386-012 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
| PRP012-11737 | Parker Hannifin Corporation Div O-Ring Division (USA) |
| AS568-012AMS7267 | Sae International Dba Sae International (USA) |
| MS9386-012 PRIMARY | Sae International Dba Sae International (USA) |
| A-012TH1167 | Hutchinson Seal De Mexico Stillman Seal Division Div Stillman Seal,jpr,espa (MEX) |
| 012-11737 | Parker Hannifin Corporation Div O-Ring Division (USA) |
| Reference | Meaning |
|---|---|
| SAE-AS9386 | 3/1 Design control — primary reference Sae International Dba Sae International |
| MS9386-012ES | 5/9 Secondary reference Eriks B.v. |
| 2-012 S355-75 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| MS9386-012 | 3/9 Design control — primary reference U.S. Government activity |
| MS9386-012 | 5/9 Secondary reference U.S. Government activity |
| 5331PL0653320 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| AS9386B | 5/9 Secondary reference Sae International Dba Sae International |
| 5331PL1695136 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| SAE AS9386B | 3/1 Design control — primary reference Sae International Dba Sae International |
| AS568-012AMS7267 | 5/9 Secondary reference U.S. Government activity |
| AS9386-012 | 5/9 Secondary reference Sae International Dba Sae International |
| A-012TH1167 | 5/2 Secondary reference U.S. Government activity |
NSN 5331-00-221-6128 is a O-Ring, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-221-6128 has 6 manufacturer part numbers on file: MS9386-012 (Hamilton Sundstrand Corporation Dba Collins Aerospace), PRP012-11737 (Parker Hannifin Corporation Div O-Ring Division), AS568-012AMS7267 (Sae International Dba Sae International), MS9386-012 (Sae International Dba Sae International), A-012TH1167 (Hutchinson Seal De Mexico Stillman Seal Division Div Stillman Seal,jpr,espa) and 1 more.
Key specifications for MS9386-012: Temp Rating: -85.0 FAHRENHEIT AND 500.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN; Outside Diameter: 0.504 INCHES NOMINAL 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.