The O-Ring, cataloged under National Stock Number 5331-01-481-3964, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 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 | 5331-01-481-3964 |
| Primary Part Number | K90147 |
| 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 |
|---|---|
| K90147 PRIMARY | Kalrez Usa, Llc (USA) |
| A9A01202-00676 | Greene Tweed & Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 5331PL1696691 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| A9A01202-00616 | 5/9 Secondary reference Greene Tweed & Co Inc |
| 4074T58P38 | 1/2 Source control — Government-approved source U.S. Government activity |
| 5331PL1696664 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5331-01-481-3964 is a O-Ring, manufactured by Kalrez Usa, Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-481-3964 has 2 manufacturer part numbers on file: K90147 (Kalrez Usa, Llc), A9A01202-00676 (Greene Tweed & Co Inc).
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.