The Cover,fluid Filter, cataloged under National Stock Number 4330-01-306-0451, 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 Schroeder Industries Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4330-01-306-0451 |
| Primary Part Number | TF-11Q |
| Item Name | Cover,fluid Filter |
| FSC / FSG | 4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters |
| Manufacturer | Schroeder Industries Llc |
| Status | ACTIVE |
| Cross-Sectional Shape Style | FLAT |
| Outside Diameter | 3.938 INCHES NOMINAL IN |
| Fluid Filter Element Retainer | INCLUDED |
| Peripheral Shape Style | CIRCULAR |
| Material | IRON CAST |
| 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 |
|---|---|
| TF-11Q PRIMARY | Schroeder Industries Llc (USA) |
| Reference | Meaning |
|---|---|
| D-2521-1 | D/9 Drawing number reference only Schroeder Industries Llc |
NSN 4330-01-306-0451 is a Cover,fluid Filter, manufactured by Schroeder Industries Llc, classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
NSN 4330-01-306-0451 has 1 manufacturer part number on file: TF-11Q (Schroeder Industries Llc).
1 possible match (shared part number, not a government interchangeability claim): 4330-01-306-6430. Verify interchangeability with system specifications before substitution.
Key specifications for TF-11Q: Cross-Sectional Shape Style: FLAT; Outside Diameter: 3.938 INCHES NOMINAL IN; Special Features: SELF-THREADED PLUG W/PINS,MACHINED TO HOUSE SPRING AND AIR-BLEED PLUG; E/I TF-50 FILTER; Fluid Filter Element Retainer: INCLUDED. 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.