The O-Ring, cataloged under National Stock Number 5331-01-576-5371, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Parker Hannifin Corporation Div Hydraulic Filter Division, Fairey Arlon Operations. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 5331-01-576-5371 |
| Primary Part Number | N53905 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Parker Hannifin Corporation Div Hydraulic Filter Division, Fairey Arlon Operations |
| 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 |
|---|---|
| N53905 PRIMARY | Parker Hannifin Corporation Div Hydraulic Filter Division, Fairey Arlon Operations (USA) |
| Reference | Meaning |
|---|---|
| 18KP840 | C/1 Advisory reference — outside the item-of-supply concept Oshkosh Corp |
| 16133 | D/9 Drawing number reference only Parker-Hannifin Corporation Dba Hydraulic Filter Division Div Hydraulic & Fuel Filter Division |
NSN 5331-01-576-5371 is a O-Ring, manufactured by Parker Hannifin Corporation Div Hydraulic Filter Division, Fairey Arlon Operations, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-576-5371 has 1 manufacturer part number on file: N53905 (Parker Hannifin Corporation Div Hydraulic Filter Division, Fairey Arlon Operations).
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-578-6257, 6515-01-583-2476, 4730-01-688-8026. Verify interchangeability with system specifications before substitution.
Key specifications for N53905: Special Features: DRAIN PLUG; Part Name Assigned by Controlling Agency: O-RING; End Item Identification: 2320-01-544-2244, TRUCK PALLETIZED LOADING. 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.