The Vacuum Pump Unit,reciprocating, cataloged under National Stock Number 4310-01-015-4781, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4310-01-015-4781 |
| Item Name | Vacuum Pump Unit,reciprocating |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Status | ACTIVE |
| Discharge Connection Quantity | 1 |
| Phase | THREE |
| Pumping Element Type | PISTON |
| Intake Connection Type | THREADED INTERNAL |
| Frequency in Hertz | 400.0 |
| Current Type | AC |
| Vacuum Rating | 1.8 MILLITORR |
| Voltage in Volts | 115.0 AND 230.0 |
| Pump Quantity | 1 |
| Gas for Which Designed | AIR |
| Stage Quantity | 2 |
| Discharge Connection Type | THREADED INTERNAL |
| Cylinder Arrangement Style | VERTICAL DESIGN |
| Intake Connection Quantity | 3 |
| System Design | NONCORROSIVE |
| Prime Mover Type | ELECTRIC MOTOR |
| Pump Cylinder Quantity | 2 |
| Cooling Medium | AIR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 54494-90017 | 3/2 Design control — primary reference U.S. Government activity |
| 256-0-1 | C/1 Advisory reference — outside the item-of-supply concept Bei Sensors & Systems Company, Inc. Dba Bei Duncan |
| 577-0-1 | 5/9 Secondary reference Davidson, John C Dba K I M Aerotech |
| 256-0-1 | 5/9 Secondary reference Bei Sensors & Systems Co. Inc Dba Edcliff Instruments Division |
NSN 4310-01-015-4781 is a Vacuum Pump Unit,reciprocating, classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 5935-01-097-7630, 5998-01-224-1993, 5925-01-424-9616. Verify interchangeability with system specifications before substitution.
Key specifications for 4310-01-015-4781: Discharge Connection Quantity: 1; Phase: THREE; Pumping Element Type: PISTON; Intake Connection Type: THREADED INTERNAL. 18 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.