The O-Ring, cataloged under National Stock Number 5331-01-222-6593, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Sae International Dba Sae International. Government technical data includes 8 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through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5331-01-222-6593 |
| Primary Part Number | MS28775-268 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Temp Rating | -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Criticality Code Justification | ZZZW |
| Elongation Percentage | 160 MAXIMUM |
| Departure From Cited Document | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Peripheral Diameter | 8.762 INCHES NOMINAL IN |
| Center Hole Diameter | 8.454 INCHES MINIMUM AND 8.514 INCHES MAXIMUM IN |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| MS28775-268 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| 299945 ITEM 9 | 5/1 Secondary reference Oil States Industries, Inc. Div Special Products Div |
| 299945-100-2 | 5/9 Secondary reference Edwards Aerospace Inc |
| MS28775-268 | 5/9 Secondary reference U.S. Government activity |
| 299945-100-2 | 5/1 Secondary reference Oil States Industries, Inc. Div Special Products Div |
| MS28775-268 | 5/9 Secondary reference U.S. Government activity |
| MS28775-268 | 5/9 Secondary reference U.S. Government activity |
| MIL-P-25732 REVC | 5/1 Secondary reference U.S. Government activity |
| 299945 ITEM 9 | 5/9 Secondary reference Edwards Aerospace Inc |
| F20-08702PC16 | 5/1 Secondary reference Tyco Fire Products Lp |
| SAE-AS28775 | 3/1 Design control — primary reference Sae International Dba Sae International |
NSN 5331-01-222-6593 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-222-6593 has 1 manufacturer part number on file: MS28775-268 (Sae International Dba Sae International).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-307-7557. Verify interchangeability with system specifications before substitution.
Key specifications for MS28775-268: Temp Rating: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Criticality Code Justification: ZZZW; Elongation Percentage: 160 MAXIMUM. 8 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.