The O-Ring, cataloged under National Stock Number 5331-00-452-1581, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Cummins Inc.. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5331-00-452-1581 |
| Primary Part Number | 156545 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Cummins Inc. |
| Status | ACTIVE |
| Cross-Sectional Height | 0.113 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN |
| Center Hole Diameter | 0.419 INCHES MINIMUM AND 0.429 INCHES MAXIMUM IN |
| Material | RUBBER SYNTHETIC |
| 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 |
|---|---|
| 156545 PRIMARY | Cummins Inc. (USA) |
| Reference | Meaning |
|---|---|
| 5330004521581 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| 10004961 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5331-00-452-1581 is a O-Ring, manufactured by Cummins Inc., classified under FSC 5331, O-ring. Status: active.
NSN 5331-00-452-1581 has 1 manufacturer part number on file: 156545 (Cummins Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5306-01-604-8909. Verify interchangeability with system specifications before substitution.
Key specifications for 156545: Cross-Sectional Height: 0.113 INCHES MINIMUM AND 0.119 INCHES MAXIMUM IN; Center Hole Diameter: 0.419 INCHES MINIMUM AND 0.429 INCHES MAXIMUM IN; Material: RUBBER SYNTHETIC. 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.