The O-Ring, cataloged under National Stock Number 5331-01-203-2571, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Norman Filter Company, L.l.c. Dba Norman Filter Co Llc. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | Norman Filter Company, L.l.c. Dba Norman Filter Co Llc (CAGE 59165) |
| Parameter | Value |
|---|---|
| NSN | 5331-01-203-2571 |
| Primary Part Number | 5214-06 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Norman Filter Company, L.l.c. Dba Norman Filter Co Llc |
| 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 |
|---|---|
| 5214-06 PRIMARY | Norman Filter Company, L.l.c. Dba Norman Filter Co Llc (USA) |
| U-10207 | Norman Filter Company, L.l.c. Dba Norman Filter Co Llc (USA) |
| U-10239 | Norman Filter Company, L.l.c. Dba Norman Filter Co Llc (USA) |
| Reference | Meaning |
|---|---|
| 521406 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 5214-99 | 5/9 Secondary reference Norman Filter Company, L.l.c. Dba Norman Filter Co Llc |
| 591406 | 5/9 Secondary reference Norman Filter Company, L.l.c. Dba Norman Filter Co Llc |
NSN 5331-01-203-2571 is a O-Ring, manufactured by Norman Filter Company, L.l.c. Dba Norman Filter Co Llc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-203-2571 has 3 manufacturer part numbers on file: 5214-06 (Norman Filter Company, L.l.c. Dba Norman Filter Co Llc), U-10207 (Norman Filter Company, L.l.c. Dba Norman Filter Co Llc), U-10239 (Norman Filter Company, L.l.c. Dba Norman Filter Co Llc).
1 possible match (shared part number, not a government interchangeability claim): 4720-01-305-5800. 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.