The Bonnet,fluid Cooler,industrial, cataloged under National Stock Number 4420-01-258-9458, is classified within Federal Supply Class 4420 (Heat Exchangers and Steam Condensers) of the Furnace, Steam, Drying, Nuclear Reactors group. The manufacturer of record is Graham Corp. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-01-258-9458 |
| Primary Part Number | D-32818-5 |
| Item Name | Bonnet,fluid Cooler,industrial |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Graham Corp |
| Status | ACTIVE |
| Style Designator | END BONNET |
| Flow Type | SINGLE PASS |
| 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 |
|---|---|
| D-32818-5 PRIMARY | Graham Corp (USA) |
| Reference | Meaning |
|---|---|
| D-32818-5 | 5/9 Secondary reference Graham Mfg Co Inc for Procurement Use CAGE Code 1lcx3 |
NSN 4420-01-258-9458 is a Bonnet,fluid Cooler,industrial, manufactured by Graham Corp, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-258-9458 has 1 manufacturer part number on file: D-32818-5 (Graham Corp).
Key specifications for D-32818-5: Style Designator: END BONNET; Flow Type: SINGLE PASS; Special Features: OUTLET END APPLICATION; End Item Identification: GRAHAM MANUFACTURING COMPANY,STEAM CONDENSER,MODEL 43X9FT,SERIAL NO. 47590M. 2 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.