The Impeller,pump,centrifugal, cataloged under National Stock Number 4320-01-181-0274, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Pentair Pump Group, Inc. Dba Fairbanks Morse Pump. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4320-01-181-0274 |
| Primary Part Number | K4B1E |
| Item Name | Impeller,pump,centrifugal |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Pentair Pump Group, Inc. Dba Fairbanks Morse Pump |
| Status | ACTIVE |
| Material | NICKEL ALLOY |
| 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 |
|---|---|
| K4B1E PRIMARY | Pentair Pump Group, Inc. Dba Fairbanks Morse Pump (USA) |
| 99K4B PIECE 1A | Pentair Pump Group, Inc. Dba Fairbanks Morse Pump (USA) |
| Reference | Meaning |
|---|---|
| 99K4B-V | D/9 Drawing number reference only Pentair Pump Group, Inc. Dba Fairbanks Morse Pump |
NSN 4320-01-181-0274 is a Impeller,pump,centrifugal, manufactured by Pentair Pump Group, Inc. Dba Fairbanks Morse Pump, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-181-0274 has 2 manufacturer part numbers on file: K4B1E (Pentair Pump Group, Inc. Dba Fairbanks Morse Pump), 99K4B PIECE 1A (Pentair Pump Group, Inc. Dba Fairbanks Morse Pump).
1 possible match (shared part number, not a government interchangeability claim): 4320-01-181-0275. Verify interchangeability with system specifications before substitution.
Key specifications for K4B1E: Special Features: MATL SPEC QQ-N-288,COMP A; End Item Identification: COLT INDUSTRIES 4.000 IN. CENTRIFUGAL PUMP IN; Material: NICKEL ALLOY. 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.