The Bonnet,cooler, cataloged under National Stock Number 4420-01-220-8329, 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 Young Touchstone Company Div Young Touchstone. Government technical data includes 1 specification, 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 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 | 4420-01-220-8329 |
| Primary Part Number | 117496 |
| Item Name | Bonnet,cooler |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Young Touchstone Company Div Young Touchstone |
| Status | ACTIVE |
| General Characteristics Item Description | STAINLESS STEEL; REAR APPLICATION |
| 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 |
|---|---|
| 117496 PRIMARY | Young Touchstone Company Div Young Touchstone (USA) |
NSN 4420-01-220-8329 is a Bonnet,cooler, manufactured by Young Touchstone Company Div Young Touchstone, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-220-8329 has 1 manufacturer part number on file: 117496 (Young Touchstone Company Div Young Touchstone).
1 possible match (shared part number, not a government interchangeability claim): 3120-01-239-3401. Verify interchangeability with system specifications before substitution.
Key specifications for 117496: General Characteristics Item Description: STAINLESS STEEL; REAR APPLICATION; End Item Identification: 6110-01-155-7000. 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.