The O-Ring, cataloged under National Stock Number 5331-01-232-4255, 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 5 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-232-4255 |
| Primary Part Number | MS28775-394 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Cross-Sectional Height | 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN |
| Outside Diameter | 25.235 INCHES MINIMUM AND 25.485 INCHES MAXIMUM IN |
| Hardness Rating | 75.0 SHORE DUROMETER A NOMINAL |
| Center Hole Diameter | 24.880 INCHES MINIMUM AND 25.000 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 | X |
| Part Number | Manufacturer |
|---|---|
| MS28775-394 PRIMARY | Sae International Dba Sae International (USA) |
| 1C-4355 PIECE 63 | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| 2-394N304-75 | Parker-Hannifin Corp Div O-Ring Division (USA) |
| 1C-4355 PIECE 63 | Toolex, Inc Dba Toolex Inc (USA) |
| Reference | Meaning |
|---|---|
| SAE-AS28775 | 3/1 Design control — primary reference Sae International Dba Sae International |
| MS28775-394 | 5/9 Secondary reference U.S. Government activity |
| MS28775-394 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5331-01-232-4255 is a O-Ring, manufactured by Sae International Dba Sae International, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-232-4255 has 4 manufacturer part numbers on file: MS28775-394 (Sae International Dba Sae International), 1C-4355 PIECE 63 (Curtiss-Wright Electro-Mechanical Corporation Div Epd), 2-394N304-75 (Parker-Hannifin Corp Div O-Ring Division), 1C-4355 PIECE 63 (Toolex, Inc Dba Toolex Inc).
Key specifications for MS28775-394: Cross-Sectional Height: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN; Outside Diameter: 25.235 INCHES MINIMUM AND 25.485 INCHES MAXIMUM IN; Hardness Rating: 75.0 SHORE DUROMETER A NOMINAL; Center Hole Diameter: 24.880 INCHES MINIMUM AND 25.000 INCHES MAXIMUM IN. 5 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.