The O-Ring, cataloged under National Stock Number 5331-01-554-4436, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Critical Solutions International, Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-01-554-4436 |
| Primary Part Number | FP2021 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Critical Solutions International, 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 | X |
| Part Number | Manufacturer |
|---|---|
| FP2021 PRIMARY | Critical Solutions International, Llc (USA) |
| Reference | Meaning |
|---|---|
| FD0885 | D/9 Drawing number reference only Critical Solutions International, Llc |
NSN 5331-01-554-4436 is a O-Ring, manufactured by Critical Solutions International, Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-554-4436 has 1 manufacturer part number on file: FP2021 (Critical Solutions International, Llc).
Key specifications for FP2021: Special Features: QUANTITY 2; Part Name Assigned by Controlling Agency: O RING,FILLER AND DRAIN PLUG; End Item Identification: 2355-01-542-7908 INTERIM VEHICLE - MOUNTED MINE DETECTOR. 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.