The Head,fluid Filter, cataloged under National Stock Number 4330-01-121-0973, is classified within Federal Supply Class 4330 (Centrifugals, Separators, and Pressure and Vacuum Filters) of the Pumps and Compressors group. The manufacturer of record is Donaldson Company, Inc.. Government technical data includes 17 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4330-01-121-0973 |
| Primary Part Number | 424743 |
| Item Name | Head,fluid Filter |
| FSC / FSG | 4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters |
| Manufacturer | Donaldson Company, Inc. |
| Status | ACTIVE |
| Inlet Port Type | THREADED FEMALE, GASKET SEAL |
| Outlet Thread Class | 2B |
| Inlet Nominal Thread Size | 1.625 INCHES IN |
| Outlet Port Type | THREADED FEMALE, GASKET SEAL |
| Outlet Thread Direction | RIGHT-HAND |
| Outlet Thread Series Designator | UN |
| Material Document and Classification | QQ-A-200/8C, T6 FED SPEC SINGLE MATERIAL RESPONSE |
| Mounting Bolt Hole | NOT PROVIDED |
| Valve | INCLUDED |
| Inlet Thread Series Designator | UN |
| Valve Type | CHECK |
| Outlet Thread Quantity Per Inch | 12 |
| Inlet Thread Quantity Per Inch | 12 |
| Filter Element | NOT INCLUDED |
| Material | ALUMINUM ALLOY 6061 |
| Inlet Thread Class | 2B |
| Outlet Nominal Thread Size | 1.625 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4330-01-121-0973 is a Head,fluid Filter, manufactured by Donaldson Company, Inc., classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
NSN 4330-01-121-0973 has 2 manufacturer part numbers on file: 424742-5 (Donaldson Company, Inc.), 424743 (Donaldson Company, Inc.).
Key specifications for 424743: Overall Height: 6.000 INCHES NOMINAL IN; Inlet Port Type: THREADED FEMALE, GASKET SEAL; Outlet Thread Class: 2B; Inlet Nominal Thread Size: 1.625 INCHES IN. 17 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.