The O-Ring, cataloged under National Stock Number 5331-00-584-1978, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-00-584-1978 |
| Primary Part Number | 2R484PC21 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots |
| Status | ACTIVE |
| Cross-Sectional Height | 0.269 INCHES MINIMUM AND 0.283 INCHES MAXIMUM IN |
| Center Hole Diameter | 6.952 INCHES MINIMUM AND 6.998 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 |
|---|---|
| 2R484PC21 PRIMARY | Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots (USA) |
| 2R460PC21 PRIMARY | Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots (USA) |
| 2R450PC21 PRIMARY | Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots (USA) |
| 2R482REVALINE3 PRIMARY | Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots (USA) |
| 2R464REVALINE3 PRIMARY | Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots (USA) |
| Reference | Meaning |
|---|---|
| 0327-68 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters |
| 586-513-1720835REVALINE3 | 3/2 Design control — primary reference U.S. Government activity |
| 0327-68 | 5/9 Secondary reference Parker-Hannifin Corp Div O-Ring Division |
| 586-513-1720836REVALINE3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5331-00-584-1978 is a O-Ring, manufactured by Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots, classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-584-1978 has 5 manufacturer part numbers on file: 2R484PC21 (Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots), 2R460PC21 (Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots), 2R450PC21 (Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots), 2R482REVALINE3 (Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots), 2R464REVALINE3 (Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots).
2 possible matches (shared part number, not a government interchangeability claim): 4140-01-503-5643, 6515-01-517-3237. Verify interchangeability with system specifications before substitution.
Key specifications for 2R484PC21: Cross-Sectional Height: 0.269 INCHES MINIMUM AND 0.283 INCHES MAXIMUM IN; Center Hole Diameter: 6.952 INCHES MINIMUM AND 6.998 INCHES MAXIMUM IN; Material: RUBBER SILICONE CLASS Q. 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.