The Seal Assembly,shaft,spring Loade, cataloged under National Stock Number 4320-01-333-5747, 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 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4320-01-333-5747 |
| Primary Part Number | 678330 |
| 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 |
| General Characteristics Item Description | TYPE 221; SPLIT SEAL ASSEMBLY; MAY BE INSTALLED ON A UNWORN SHAFT OUTSIDE THE STUFFING BOX; DESIGNED FOR SHAFT SIZE 1.500 INCH O.D.,MAX GLAND DIAMETER 5.000 INCHES; GLAND LENGTH 2.000 INCHES; MATERIALS OF GLAND AND ROTATING HOUSING 316 STAINLESS STEEL; O-RINGS VITON; ROTARY FACE CARBON STEEL; STATIONARY FACE ALUMINA CERAMIC; TEMPERATURE RATING UP TO 250 DEGREES FAHRENHEIT; PRESSURE RATING 150 PISG; SPEED RATING 3600 RPM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4320-01-333-5747 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 4320-01-333-5747 has 2 manufacturer part numbers on file: 678330 (A W Chesterton Co Div Sealing Device Division), 43889 (A W Chesterton Co Div Sealing Device Division).
1 possible match (shared part number, not a government interchangeability claim): 6520-01-677-7202. Verify interchangeability with system specifications before substitution.
Key specifications for 678330: General Characteristics Item Description: TYPE 221; SPLIT SEAL ASSEMBLY; MAY BE INSTALLED ON A UNWORN SHAFT OUTSIDE THE STUFFING BOX; DESIGNED FOR SHAFT SIZE 1.500 INCH O.D.,MAX GLAND DIAMETER 5.000 INCHES; GLAND LENGTH 2.000 INCHES; MATERIALS OF GLAND AND ROTATING HOUSING 316 STAINLESS STEEL; O-RINGS VITON; ROTARY FACE CARBON STEEL; STATIONARY FACE ALUMINA CERAMIC; TEMPERATURE RATING UP TO 250 DEGREES FAHRENHEIT; PRESSURE RATING 150 PISG; SPEED RATING 3600 RPM IN; End Item Identification: PUMP UNIT CENTRIFUGAL PART NUMBER 2 1/2 X 4 CCLY ONBOARD 378 FT WHEC COAST GUARD VESSELS FT. 1 specification is 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.