The O-Ring, cataloged under National Stock Number 5331-01-445-0298, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Mechanical Manufacturing Corp Dba Filtration Systems Div Filtration Systems. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-445-0298 |
| Primary Part Number | BUNA O-RING SET, 8IN STRAINER |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Mechanical Manufacturing Corp Dba Filtration Systems Div Filtration Systems |
| Status | ACTIVE |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| 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 |
|---|---|
| O-BUNA, 8IN STRAINER | Mechanical Manufacturing Corp Dba Filtration Systems Div Filtration Systems (USA) |
| BUNA O-RING SET, 8IN STRAINER PRIMARY | Mechanical Manufacturing Corp Dba Filtration Systems Div Filtration Systems (USA) |
NSN 5331-01-445-0298 is a O-Ring, manufactured by Mechanical Manufacturing Corp Dba Filtration Systems Div Filtration Systems, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-445-0298 has 2 manufacturer part numbers on file: O-BUNA, 8IN STRAINER (Mechanical Manufacturing Corp Dba Filtration Systems Div Filtration Systems), BUNA O-RING SET, 8IN STRAINER (Mechanical Manufacturing Corp Dba Filtration Systems Div Filtration Systems).
Key specifications for BUNA O-RING SET, 8IN STRAINER: Special Features: SET CONSISTS OF 2 EA. O-RINGS; End Item Identification: 4730-01-435-7940; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 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.