The Ring,wearing, cataloged under National Stock Number 4320-00-591-5208, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Volvo Construction Equipment North America, Llc. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4320-00-591-5208 |
| Primary Part Number | 2523429 |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Volvo Construction Equipment North America, Llc |
| Status | ACTIVE |
| Corner Shape | SQUARE ALL CORNERS |
| Body Outside Diameter | 4.505 INCHES MINIMUM AND 4.510 INCHES MAXIMUM IN |
| End to Flange Distance | 0.188 INCHES NOMINAL IN |
| Groove Depth | 0.020 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN |
| Internal Flange Inside Diameter | 4.188 INCHES NOMINAL IN |
| Groove Quantity | 15 |
| Body Inside Diameter | 3.375 INCHES MINIMUM AND 3.380 INCHES MAXIMUM IN |
| Material | PLASTIC POLYAMIDE NYLON |
| Internal Flange Width | 0.180 INCHES MINIMUM AND 0.185 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 2523429 PRIMARY | Volvo Construction Equipment North America, Llc (USA) |
| Reference | Meaning |
|---|---|
| 550081 | 5/9 Secondary reference Vme Americas Inc Sub of Vme Group N V |
| 2523429 | 5/9 Secondary reference Vme Americas Inc Sub of Vme Group N V |
| 550081 | 5/9 Secondary reference Clark Equipment Co |
NSN 4320-00-591-5208 is a Ring,wearing, manufactured by Volvo Construction Equipment North America, Llc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-591-5208 has 1 manufacturer part number on file: 2523429 (Volvo Construction Equipment North America, Llc).
2 possible matches (shared part number, not a government interchangeability claim): 5310-01-332-1907, 4320-01-349-4366. Verify interchangeability with system specifications before substitution.
Key specifications for 2523429: Corner Shape: SQUARE ALL CORNERS; Body Outside Diameter: 4.505 INCHES MINIMUM AND 4.510 INCHES MAXIMUM IN; End to Flange Distance: 0.188 INCHES NOMINAL IN; Overall Length: 0.563 INCHES NOMINAL IN. 9 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.