The O-Ring, cataloged under National Stock Number 5331-01-641-4884, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Monroe Engineering Llc Dba Monroe Pmp. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Monroe Engineering Llc Dba Monroe Pmp (CAGE 06197) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-641-4884 |
| Primary Part Number | 284B90 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Monroe Engineering Llc Dba Monroe Pmp |
| Status | ACTIVE |
| 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 |
|---|---|
| 284B90 | Monroe Engineering Llc Dba Monroe Pmp (USA) |
| Reference | Meaning |
|---|---|
| 08001601 | D/9 Drawing number reference only U.S. Government activity |
| PL-08001601 FIND NO. 92 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5331-01-641-4884 is a O-Ring, manufactured by Monroe Engineering Llc Dba Monroe Pmp, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-641-4884 has 1 manufacturer part number on file: 284B90 (Monroe Engineering Llc Dba Monroe Pmp).
2 possible matches (shared part number, not a government interchangeability claim): 3010-01-642-7587, 6110-01-688-5805. Verify interchangeability with system specifications before substitution.
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.