The Pump,air,special, cataloged under National Stock Number 4320-01-478-2291, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Ingersoll-Rand Company Dba Ingersoll-Rand Div Tool & Hoist Division. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4320-01-478-2291 |
| Primary Part Number | 66617B-444-C |
| Item Name | Pump,air,special |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Ingersoll-Rand Company Dba Ingersoll-Rand Div Tool & Hoist Division |
| Status | ACTIVE |
| General Characteristics Item Description | 1-1/2 IN.; ALUMINUM AIR MOTOR; STAINLESS STEEL WETTED ENDS AND HARDWARE; KYMAR SEATS; POLYTETRAFLUOROETHYLENE BALL, DIAPHRAGM, AND O-RING 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 |
|---|---|
| SX7725 ITEM 407 | Ams Instrumentation & Control Limited (GBR) |
| 100752 | Ams Instrumentation & Control Limited (GBR) |
| 66617B-444-C PRIMARY | Ingersoll-Rand Company Dba Ingersoll-Rand Div Tool & Hoist Division (USA) |
| SX7725/407 | Ams Instrumentation & Control Limited (GBR) |
| Reference | Meaning |
|---|---|
| 66617B-444-C | 5/9 Secondary reference Ingersoll-Rand Company Dba Ingersoll-Rand |
| 66617B-443-C | 5/9 Secondary reference Ingersoll-Rand Company Dba Ingersoll-Rand |
NSN 4320-01-478-2291 is a Pump,air,special, manufactured by Ingersoll-Rand Company Dba Ingersoll-Rand Div Tool & Hoist Division, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-478-2291 has 4 manufacturer part numbers on file: SX7725 ITEM 407 (Ams Instrumentation & Control Limited), 100752 (Ams Instrumentation & Control Limited), 66617B-444-C (Ingersoll-Rand Company Dba Ingersoll-Rand Div Tool & Hoist Division), SX7725/407 (Ams Instrumentation & Control Limited).
1 possible match (shared part number, not a government interchangeability claim): 4220-01-538-2366. Verify interchangeability with system specifications before substitution.
Key specifications for 66617B-444-C: General Characteristics Item Description: 1-1/2 IN.; ALUMINUM AIR MOTOR; STAINLESS STEEL WETTED ENDS AND HARDWARE; KYMAR SEATS; POLYTETRAFLUOROETHYLENE BALL, DIAPHRAGM, AND O-RING 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.