The Vacuum Pump,diffusion, cataloged under National Stock Number 4310-01-320-5970, is classified within Federal Supply Class 4310 (Compressors and Vacuum Pumps) of the Pumps and Compressors group. The manufacturer of record is Piab Usa, Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4310-01-320-5970 |
| Primary Part Number | M25B5-EN |
| Item Name | Vacuum Pump,diffusion |
| FSC / FSG | 4310 / 43 — Compressors and Vacuum Pumps |
| Manufacturer | Piab Usa, Inc. |
| Status | ACTIVE |
| Vacuum Rating | 58.0 INCHES OF MERCURY IN |
| Gas for Which Designed | AIR |
| Surface Treatment | ANODIZE BODY |
| Material | ALUMINUM ALLOY PUMP BODY |
| 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 |
| Part Number | Manufacturer |
|---|---|
| M25B5-EN PRIMARY | Piab Usa, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 75B469051-1003 | 5/9 Secondary reference The Boeing Company Div Defense |
NSN 4310-01-320-5970 is a Vacuum Pump,diffusion, manufactured by Piab Usa, Inc., classified under FSC 4310, Compressors and Vacuum Pumps. Status: active.
NSN 4310-01-320-5970 has 1 manufacturer part number on file: M25B5-EN (Piab Usa, Inc.).
Key specifications for M25B5-EN: Overall Height: 3.180 INCHES NOMINAL IN; Vacuum Rating: 58.0 INCHES OF MERCURY IN; Overall Length: 16.100 INCHES MINIMUM AND 16.490 INCHES MAXIMUM IN; Overall Width: 9.060 INCHES NOMINAL IN. 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.