The O-Ring, cataloged under National Stock Number 5331-01-439-0881, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Graham Co 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-439-0881 |
| Primary Part Number | A3-6217-B500 ITEM 7 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Graham Co Inc |
| 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 |
|---|---|
| A3-6217-B500 ITEM 7 PRIMARY | Graham Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 1-4772U-P028 | 5/9 Secondary reference Graham Co Inc |
NSN 5331-01-439-0881 is a O-Ring, manufactured by Graham Co Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-439-0881 has 1 manufacturer part number on file: A3-6217-B500 ITEM 7 (Graham Co Inc).
Key specifications for A3-6217-B500 ITEM 7: 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.