The O-Ring, cataloged under National Stock Number 5331-01-561-4986, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Fluor Marine Propulsion, Llc Dba Knolls Atomic Power Laboratory. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-561-4986 |
| Primary Part Number | 185D7159-4 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Fluor Marine Propulsion, Llc Dba Knolls Atomic Power Laboratory |
| Status | ACTIVE |
| Center Hole Diameter | 2.614 INCHES NOMINAL IN |
| 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 |
|---|---|
| 185D7159-4 | Fluor Marine Propulsion, Llc Dba Knolls Atomic Power Laboratory (USA) |
| Reference | Meaning |
|---|---|
| AS568A-038 | 5/1 Secondary reference Sae International Dba Sae International |
| E0540 2-038 | 3/2 Design control — primary reference U.S. Government activity |
| AS568A-038 | 5/9 Secondary reference U.S. Government activity |
NSN 5331-01-561-4986 is a O-Ring, manufactured by Fluor Marine Propulsion, Llc Dba Knolls Atomic Power Laboratory, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-561-4986 has 1 manufacturer part number on file: 185D7159-4 (Fluor Marine Propulsion, Llc Dba Knolls Atomic Power Laboratory).
Key specifications for 185D7159-4: Special Features: TYPE ETHYLENE PROPYLENE, ID - 2.614, WIDTH 0.07, DUROMETER 80; Center Hole Diameter: 2.614 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: ATTRIBUTE VALUE O-RIRG RUBBER. 1 specification is 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.