The Bonnet,fluid Cooler,industrial, cataloged under National Stock Number 4420-01-342-3457, is classified within Federal Supply Class 4420 (Heat Exchangers and Steam Condensers) of the Furnace, Steam, Drying, Nuclear Reactors group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4420-01-342-3457 |
| Item Name | Bonnet,fluid Cooler,industrial |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Status | ACTIVE |
| Length | 9.938 INCHES NOMINAL9.938 INCHES NOMINAL IN |
| Style Designator | STRAIGHT |
| Material Document and Classification | MIL-C-15730K MIL SPEC ALL MATERIAL RESPONSES OVERALL |
| Diameter | 16.250 INCHES NOMINAL16.250 INCHES NOMINAL IN |
| Flow Type | SINGLE PASSSINGLE PASS |
| Material | COPPER ALLOY OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 51261209001 REV C PC 4 | 5/9 Secondary reference Itt Corporation Dba Itt Standard |
| 512612090001 | D/9 Drawing number reference only Itt Corporation Dba Itt Standard |
| 312521221502 | 5/9 Secondary reference Itt Corporation Dba Itt Standard |
| 3-125-2-12-215-02 | 3/9 Design control — primary reference Itt Corporation Dba Itt Standard |
NSN 4420-01-342-3457 is a Bonnet,fluid Cooler,industrial, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4320-01-343-0354. Verify interchangeability with system specifications before substitution.
Key specifications for 4420-01-342-3457: Length: 9.938 INCHES NOMINAL9.938 INCHES NOMINAL IN; Style Designator: STRAIGHT; Material Document and Classification: MIL-C-15730K MIL SPEC ALL MATERIAL RESPONSES OVERALL; Diameter: 16.250 INCHES NOMINAL16.250 INCHES NOMINAL IN. 6 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.