The O-Ring, cataloged under National Stock Number 5331-01-020-4540, 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 Accumulator Division. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5331-01-020-4540 |
| Primary Part Number | 303644 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Parker-Hannifin Corporation Div Hydraulic Accumulator Division |
| Status | ACTIVE |
| Cross-Sectional Height | 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN |
| Center Hole Diameter | 3.085 INCHES MINIMUM AND 3.115 INCHES MAXIMUM IN |
| Material | RUBBER SYNTHETIC |
| 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 |
|---|---|
| 303644 PRIMARY | Parker-Hannifin Corporation Div Hydraulic Accumulator Division (USA) |
| S1400-41MILG22050 | Parker-Hannifin Corporation Div Hydraulic Accumulator Division (USA) |
| Reference | Meaning |
|---|---|
| S1400-41C | 5/9 Secondary reference Parker-Hannifin Corporation Div Hydraulic Accumulator Division |
NSN 5331-01-020-4540 is a O-Ring, manufactured by Parker-Hannifin Corporation Div Hydraulic Accumulator Division, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-020-4540 has 2 manufacturer part numbers on file: 303644 (Parker-Hannifin Corporation Div Hydraulic Accumulator Division), S1400-41MILG22050 (Parker-Hannifin Corporation Div Hydraulic Accumulator Division).
Key specifications for 303644: Cross-Sectional Height: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN; Center Hole Diameter: 3.085 INCHES MINIMUM AND 3.115 INCHES MAXIMUM IN; Material: RUBBER SYNTHETIC. 3 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.