The O-Ring, cataloged under National Stock Number 5331-01-521-9958, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Div Kingston Operations. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Huck International, Inc. Div Kingston Operations (CAGE 72139) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-521-9958 |
| Primary Part Number | 503768 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Huck International, Inc. Div Kingston Operations |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 503768 PRIMARY | Huck International, Inc. Div Kingston Operations (USA) |
NSN 5331-01-521-9958 is a O-Ring, manufactured by Huck International, Inc. Div Kingston Operations, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-521-9958 has 1 manufacturer part number on file: 503768 (Huck International, Inc. Div Kingston Operations).
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.