The O-Ring, cataloged under National Stock Number 5331-01-646-7578, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Cummins Inc.. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 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 | 5331-01-646-7578 |
| Primary Part Number | 3975684 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Cummins Inc. |
| 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 |
|---|---|
| 3975684 PRIMARY | Cummins Inc. (USA) |
NSN 5331-01-646-7578 is a O-Ring, manufactured by Cummins Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-646-7578 has 1 manufacturer part number on file: 3975684 (Cummins Inc.).
1 possible match (shared part number, not a government interchangeability claim): 2930-01-719-1235. Verify interchangeability with system specifications before substitution.
Key specifications for 3975684: Part Name Assigned by Controlling Agency: CHECK VALVE O-RING; End Item Identification: 1940-01-615-8699. 0 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.