The O-Ring, cataloged under National Stock Number 5331-01-481-4101, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Greene Tweed & Co Inc. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Greene Tweed & Co Inc (CAGE 5F573); Kalrez Usa, Llc (CAGE 0GGM9) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-481-4101 |
| Primary Part Number | A9A01501-00616 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Greene Tweed & Co Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| A9A01501-00616 PRIMARY | Greene Tweed & Co Inc (USA) |
| K90212 PRIMARY | Kalrez Usa, Llc (USA) |
| Reference | Meaning |
|---|---|
| 4074T58P33 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 5331-01-481-4101 is a O-Ring, manufactured by Greene Tweed & Co Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-481-4101 has 2 manufacturer part numbers on file: A9A01501-00616 (Greene Tweed & Co Inc), K90212 (Kalrez Usa, Llc).
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.