The Seal Assembly,shaft,spring Loade, cataloged under National Stock Number 4320-01-450-0771, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is A W Chesterton Co Div Sealing Device Division. Government technical data includes 2 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-450-0771 |
| Primary Part Number | 630587 |
| Item Name | Seal Assembly,shaft,spring Loade |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | A W Chesterton Co Div Sealing Device Division |
| Status | ACTIVE |
| Overall Diameter | 1.875 INCHES NOMINAL IN |
| Material | CARBON |
| 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 |
|---|---|
| 630587 | A W Chesterton Co Div Sealing Device Division (USA) |
| Reference | Meaning |
|---|---|
| 630587 | 3/9 Design control — primary reference A. W. Chesterton Company |
| 1628759 ITEM NO 80 | C/1 Advisory reference — outside the item-of-supply concept A W Chesterton Co Div Sealing Device Division |
| 665144 | 5/9 Secondary reference A W Chesterton Co Div Sealing Device Division |
NSN 4320-01-450-0771 is a Seal Assembly,shaft,spring Loade, manufactured by A W Chesterton Co Div Sealing Device Division, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-450-0771 has 1 manufacturer part number on file: 630587 (A W Chesterton Co Div Sealing Device Division).
Key specifications for 630587: Overall Diameter: 1.875 INCHES NOMINAL IN; Special Features: ITEM IS COMPRISED OF CARBON AND TUNGSTEN SEAL FACES WITH EPDM (ETHYLENE PROPYLENE DIENE TERPOLYMER) ELASTOMER; Material: CARBON. 2 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.