The Seal Assembly,shaft,spring Loade, cataloged under National Stock Number 4320-01-078-2523, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-078-2523 |
| Primary Part Number | 5N9547 |
| Item Name | Seal Assembly,shaft,spring Loade |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| General Characteristics Item Description | CONSISTS OF SPRING,HELICAL COMPRESSION 1.813 IN. L. 1 IN. I.D. WIRESIZE 10 GAGE,4.5 TURNS ASSEMBLY OF PRIMARY SEAL RING 0.828 IN. I.D. 1.186 IN. O.D. 0.594 IN. L. MATERIAL-TUNGSTEN CARBIDE FLEXIBLE DIAPHRAGM,MATERIAL-BONA-N RETAINER AND DRIVE RING-STAINLESS STEEL 316 MATING RING-TUNGSTEN CARBIDE AND COP TYPE STATIONARY SECONDARY ASSEMBLY 0.813 IN. I.D. 1.375 IN. O.D. 0.375 IN. L UNIT DESIGNED FOR SHAFT 0.750 IN. 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 |
|---|---|
| 5N9547 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| 7L5663 | 5/9 Secondary reference Caterpillar Inc Div Caterpillar Defense |
| 5N6649 | 5/9 Secondary reference Caterpillar Inc Div Caterpillar Defense |
NSN 4320-01-078-2523 is a Seal Assembly,shaft,spring Loade, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-078-2523 has 1 manufacturer part number on file: 5N9547 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 5N9547: General Characteristics Item Description: CONSISTS OF SPRING,HELICAL COMPRESSION 1.813 IN. L. 1 IN. I.D. WIRESIZE 10 GAGE,4.5 TURNS ASSEMBLY OF PRIMARY SEAL RING 0.828 IN. I.D. 1.186 IN. O.D. 0.594 IN. L. MATERIAL-TUNGSTEN CARBIDE FLEXIBLE DIAPHRAGM,MATERIAL-BONA-N RETAINER AND DRIVE RING-STAINLESS STEEL 316 MATING RING-TUNGSTEN CARBIDE AND COP TYPE STATIONARY SECONDARY ASSEMBLY 0.813 IN. I.D. 1.375 IN. O.D. 0.375 IN. L UNIT DESIGNED FOR SHAFT 0.750 IN. IN. 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.