The O-Ring, cataloged under National Stock Number 5331-01-665-9434, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Armstrong Pumps Inc. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-665-9434 |
| Primary Part Number | 961131-210 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Armstrong Pumps Inc |
| Status | ACTIVE |
| Outside Diameter | 2.500 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 |
|---|---|
| 961131-210 PRIMARY | Armstrong Pumps Inc (USA) |
NSN 5331-01-665-9434 is a O-Ring, manufactured by Armstrong Pumps Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-665-9434 has 1 manufacturer part number on file: 961131-210 (Armstrong Pumps Inc).
Key specifications for 961131-210: Outside Diameter: 2.500 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: O RING, 2.5 INCH IN; End Item Identification: VAVLE,FLO-TEC. 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.