The O-Ring, cataloged under National Stock Number 5331-01-568-2125, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Barnes Group Inc. Dba Barnes Distribution. Government technical data includes 5 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-568-2125 |
| Primary Part Number | KP77891 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Barnes Group Inc. Dba Barnes Distribution |
| Status | ACTIVE |
| Cross-Sectional Height | 0.0625 INCHES NOMINAL IN |
| Outside Diameter | 0.8125 INCHES NOMINAL IN |
| Color | BLACK |
| Center Hole Diameter | 0.6250 INCHES NOMINAL IN |
| Material | RUBBER NATURAL |
| 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 |
|---|---|
| KP77891 PRIMARY | Barnes Group Inc. Dba Barnes Distribution (USA) |
NSN 5331-01-568-2125 is a O-Ring, manufactured by Barnes Group Inc. Dba Barnes Distribution, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-568-2125 has 1 manufacturer part number on file: KP77891 (Barnes Group Inc. Dba Barnes Distribution).
Key specifications for KP77891: Cross-Sectional Height: 0.0625 INCHES NOMINAL IN; Outside Diameter: 0.8125 INCHES NOMINAL IN; Color: BLACK; Special Features: SPECIALLY COMPOUNDED FOR AIR CONDITIONING REFRIGERANT AND CONNECTIONS ON R-12 FREON SYSTEMS.. 5 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.