The O-Ring, cataloged under National Stock Number 5331-00-121-2820, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Flowserve Corp Dba Automax Actuators Div Flowserve Us Company. Government technical data includes 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-121-2820 |
| Primary Part Number | 01-472-0004-3PC57 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Flowserve Corp Dba Automax Actuators Div Flowserve Us Company |
| Status | ACTIVE |
| Cross-Sectional Height | 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN |
| Center Hole Diameter | 0.544 INCHES MINIMUM AND 0.554 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 |
|---|---|
| 01-472-0004-3PC57 | Flowserve Corp Dba Automax Actuators Div Flowserve Us Company (USA) |
| Reference | Meaning |
|---|---|
| CM1-010-B46A | 3/9 Design control — primary reference Timken Gears & Services Inc. Div Philadelphia Gear |
| 01-472-0004-3PC57 | 5/9 Secondary reference Timken Gears & Services Inc. Div Philadelphia Gear |
NSN 5331-00-121-2820 is a O-Ring, manufactured by Flowserve Corp Dba Automax Actuators Div Flowserve Us Company, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-121-2820 has 1 manufacturer part number on file: 01-472-0004-3PC57 (Flowserve Corp Dba Automax Actuators Div Flowserve Us Company).
Key specifications for 01-472-0004-3PC57: Cross-Sectional Height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN; Center Hole Diameter: 0.544 INCHES MINIMUM AND 0.554 INCHES MAXIMUM IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 3 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.