The Bonnet,fluid Cooler,industrial, cataloged under National Stock Number 4420-01-337-1111, 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6 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4420-01-337-1111 |
| Item Name | Bonnet,fluid Cooler,industrial |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Status | ACTIVE |
| Length | 6.900 INCHES NOMINAL6.900 INCHES NOMINAL IN |
| Style Designator | DOUBLE FLANGE |
| Diameter | 10.250 INCHES NOMINAL10.250 INCHES NOMINAL IN |
| Flow Type | TWO PASSTWO PASS |
| Height | 11.560 INCHES NOMINAL11.560 INCHES NOMINAL IN |
| Material | BRASS 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 |
|---|---|
| 5-036-08-048-009 PC 3 | 5/9 Secondary reference Itt Corporation Dba Itt Standard |
| 3-130-2-08-220-04 | C/1 Advisory reference — outside the item-of-supply concept Fluid Handling Llc |
| 3-130-2-08-220-04 | 3/9 Design control — primary reference Itt Corporation Dba Itt Standard |
| 5-036-08-048-009 PC 3 | C/1 Advisory reference — outside the item-of-supply concept Fluid Handling Llc |
| 5-036-08-048-009 | D/9 Drawing number reference only Itt Corporation Dba Itt Standard |
NSN 4420-01-337-1111 is a Bonnet,fluid Cooler,industrial, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4420-01-337-1112, 4320-01-337-7063. Verify interchangeability with system specifications before substitution.
Key specifications for 4420-01-337-1111: Length: 6.900 INCHES NOMINAL6.900 INCHES NOMINAL IN; Style Designator: DOUBLE FLANGE; Diameter: 10.250 INCHES NOMINAL10.250 INCHES NOMINAL IN; Flow Type: TWO PASSTWO PASS. 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.