The O-Ring, cataloged under National Stock Number 5331-01-547-0474, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-01-547-0474 |
| Primary Part Number | 9557K76 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| 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 |
|---|---|
| 9557K76 | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 125X2G | 3/2 Design control — primary reference U.S. Government activity |
NSN 5331-01-547-0474 is a O-Ring, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-547-0474 has 1 manufacturer part number on file: 9557K76 (Mcmaster-Carr Supply Co).
Key specifications for 9557K76: Special Features: 2.25 OD X 2.00 ID X .125 WIDTH, EPDM;REQUIRED 2; Part Name Assigned by Controlling Agency: O-RING; End Item Identification: NSN: 6665-01-452-9644. 0 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.