The O-Ring, cataloged under National Stock Number 5331-01-526-7199, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Kalrez Usa, Llc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | O-Ring |
| FSC / FSG | 5331 — O-ring (FSG 53) |
| Manufacturers | Kalrez Usa, Llc (CAGE 0GGM9); Greene Tweed & Co Inc (CAGE 5F573) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-526-7199 |
| Primary Part Number | K90298 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Kalrez Usa, Llc |
| 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 |
|---|---|
| K90298 PRIMARY | Kalrez Usa, Llc (USA) |
| A915601-00616 PRIMARY | Greene Tweed & Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 4074T58 | 5/2 Secondary reference U.S. Government activity |
| 4074T58P61 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 5331-01-526-7199 is a O-Ring, manufactured by Kalrez Usa, Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-526-7199 has 2 manufacturer part numbers on file: K90298 (Kalrez Usa, Llc), A915601-00616 (Greene Tweed & Co Inc).
3 possible matches (shared part number, not a government interchangeability claim): 5331-01-526-8369, 5331-01-526-8373, 5331-01-576-3020. Verify interchangeability with system specifications before substitution.
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.