The Valve Flapper,pump, cataloged under National Stock Number 4320-01-489-5705, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Industrial Res Mch Pdts Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-489-5705 |
| Primary Part Number | 05-0900 |
| Item Name | Valve Flapper,pump |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Industrial Res Mch Pdts Llc |
| Status | ACTIVE |
| 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 |
|---|---|
| 05-0900 PRIMARY | Industrial Res Mch Pdts Llc (USA) |
| Reference | Meaning |
|---|---|
| 05-0900 | 5/9 Secondary reference Uop Inc Fluid Systems Div |
NSN 4320-01-489-5705 is a Valve Flapper,pump, manufactured by Industrial Res Mch Pdts Llc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-489-5705 has 1 manufacturer part number on file: 05-0900 (Industrial Res Mch Pdts Llc).
2 possible matches (shared part number, not a government interchangeability claim): 6550-01-530-6576, 4320-01-585-2537. Verify interchangeability with system specifications before substitution.
Key specifications for 05-0900: Part Name Assigned by Controlling Agency: PERMEATE PORT; End Item Identification: FRP PRESSURE TUBE 03-0812. 0 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.