The O-Ring, cataloged under National Stock Number 5331-01-169-4570, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Kirby Morgan Dive Systems Inc. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 5331-01-169-4570 |
| Primary Part Number | 520-033 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Kirby Morgan Dive Systems 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 | X |
| Part Number | Manufacturer |
|---|---|
| 520-033 PRIMARY | Kirby Morgan Dive Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 5331PL0719933 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 592-6318212 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 18-90B | 5/9 Secondary reference Kirby Morgan Dive Systems Inc |
NSN 5331-01-169-4570 is a O-Ring, manufactured by Kirby Morgan Dive Systems Inc, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-169-4570 has 1 manufacturer part number on file: 520-033 (Kirby Morgan Dive Systems Inc).
1 possible match (shared part number, not a government interchangeability claim): 4240-01-395-4575. Verify interchangeability with system specifications before substitution.
Key specifications for 520-033: End Item Identification: DLA/GSA MANAGED ITEMS THAT CANNOT BE IDENTIFIED TO SPECIFIC ARMY WEAPONSWEAPONS SYSTEMS/END ITEMS. 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.