The Ring,vacuum Pump, cataloged under National Stock Number 1650-00-441-2801, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. The manufacturer of record is Ingersoll-Rand Company Dba Ingersoll-Rand. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-00-441-2801 |
| Primary Part Number | A501-44 |
| Item Name | Ring,vacuum Pump |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Ingersoll-Rand Company Dba Ingersoll-Rand |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,MIL-S-6709,0.945 IN. MIN,0.949 IN. MAX OD,,0.310 IN. MIN,0.314IN. MAX THK,0.6687 IN. MIN,0.6690 IN. MAX OFFSET ID 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 |
|---|---|
| A501-44 PRIMARY | Ingersoll-Rand Company Dba Ingersoll-Rand (USA) |
NSN 1650-00-441-2801 is a Ring,vacuum Pump, manufactured by Ingersoll-Rand Company Dba Ingersoll-Rand, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-00-441-2801 has 1 manufacturer part number on file: A501-44 (Ingersoll-Rand Company Dba Ingersoll-Rand).
Key specifications for A501-44: General Characteristics Item Description: STEEL,MIL-S-6709,0.945 IN. MIN,0.949 IN. MAX OD,,0.310 IN. MIN,0.314IN. MAX THK,0.6687 IN. MIN,0.6690 IN. MAX OFFSET ID 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.