The Valve,check,filter, cataloged under National Stock Number 4330-01-121-6399, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4330-01-121-6399 |
| Primary Part Number | 4110-133 |
| Item Name | Valve,check,filter |
| FSC / FSG | 4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters |
| Manufacturer | Donaldson Company, Inc. |
| Status | ACTIVE |
| General Characteristics Item Description | LEFT HAND SIDE OF FILTER ASSEMBLY |
| 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 |
|---|---|
| 911-170 ITEM 28 | Donaldson Company, Inc. (USA) |
| 4110-133 PRIMARY | Donaldson Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 911-170 | D/9 Drawing number reference only Donaldson Company, Inc. |
NSN 4330-01-121-6399 is a Valve,check,filter, manufactured by Donaldson Company, Inc., classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
NSN 4330-01-121-6399 has 2 manufacturer part numbers on file: 911-170 ITEM 28 (Donaldson Company, Inc.), 4110-133 (Donaldson Company, Inc.).
3 possible matches (shared part number, not a government interchangeability claim): 4330-01-127-5171, 4330-01-343-8537, 5305-01-470-3562. Verify interchangeability with system specifications before substitution.
Key specifications for 4110-133: General Characteristics Item Description: LEFT HAND SIDE OF FILTER ASSEMBLY. 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.