The Pump Assembly,oil-Less, cataloged under National Stock Number 4320-01-278-9221, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Gast Mfg Corp. Government technical data includes 5 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-278-9221 |
| Primary Part Number | 1550-600 |
| Item Name | Pump Assembly,oil-Less |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Gast Mfg Corp |
| Status | ACTIVE |
| Model Number | STD500 |
| General Characteristics Item Description | PRESSURE: 1440RPM = 1.0HP, 0.74KW, 1725RPM = 1.5HP, 1.1KW, VACUUM = 1440RPM, .50, 0.37KW, 1725RPM = .75HP, 0.56KW RPM |
| Special Test Features | RELATIVE HUMIDITY: 8% - 100% NON CONDENSING, CLEAN DUST FREE ENVIRONMENT |
| Storage Temp Range | +1.0 TO 40.0 CELSIUS DEGC |
| Unpackaged Unit Weight | 33.00 POUNDS LBS |
| 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 |
|---|---|
| 1550-600 PRIMARY | Gast Mfg Corp (USA) |
| Reference | Meaning |
|---|---|
| 100-DC167 | 5/9 Secondary reference Rhine Air, Inc |
| 1550-P139B | 3/9 Design control — primary reference Gast Mfg Corp |
| 1550-P167 | 5/9 Secondary reference Gast Mfg Corp |
| 100-GC167 | C/1 Advisory reference — outside the item-of-supply concept Rhine Air, Inc |
NSN 4320-01-278-9221 is a Pump Assembly,oil-Less, manufactured by Gast Mfg Corp, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-278-9221 has 1 manufacturer part number on file: 1550-600 (Gast Mfg Corp).
Key specifications for 1550-600: Overall Height: 6.46 INCHES NOMINAL IN; Model Number: STD500; General Characteristics Item Description: PRESSURE: 1440RPM = 1.0HP, 0.74KW, 1725RPM = 1.5HP, 1.1KW, VACUUM = 1440RPM, .50, 0.37KW, 1725RPM = .75HP, 0.56KW RPM; Special Test Features: RELATIVE HUMIDITY: 8% - 100% NON CONDENSING, CLEAN DUST FREE ENVIRONMENT. 5 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.