NSN Explorer

Open demand × Furnace, Steam Plant, and Drying Equipment; and Nuclear Reactors

Heat Exchangers and Steam Condensers FSC 4420

Open solicitations in Federal Supply Class 4420 — real requests for quote a supplier can bid on today, linked to the official DIBBS record for each one — plus the ones we've already recorded as they closed. Nothing here gets deleted when it expires: this category's demand history grows every time an RFQ closes.

17
Open solicitations
17
Closing within 7 days
120
Total open quantity
51
Tracked all-time (34 closed)

Open parts

4420-01-679-5886

CORE ASSEMBLY,FLUID COOLER

Open · closes in 1d 12 units

1 solicitation (1 open · 0 closed)

4420-01-101-5902

COOLER,FLUID,INDUSTRIAL

Open · closes in 1d 1 units

1 solicitation (1 open · 0 closed)

4420-01-389-9046

CORE ASSEMBLY,FLUID COOLER

Open · closes in 4d 1 units

1 solicitation (1 open · 0 closed)

4420-99-429-1675

COOLER, FLUID, INDUST

Open · closes in 7d 1 units

2 solicitations (1 open · 1 closed)

4420-01-238-6935

RESERVOIR,COOLING U

Open · closes in 7d 6 units

1 solicitation (1 open · 0 closed)

4420-01-306-6440

HEATER,FLUID,INDUSTRIAL

Open · closes in 7d 8 units

1 solicitation (1 open · 0 closed)

4420-01-456-4333

COOLER,FLUID,INDUSTRIAL

Open · closes in 7d 5 units

1 solicitation (1 open · 0 closed)

4420-01-374-7944

COOLER,FLUID,INDUSTRIAL

Open · closes in 7d 2 units

1 solicitation (1 open · 0 closed)

4420-01-375-8760

COOLER,FLUID,INDUSTRIAL

Open · closes in 7d 1 units

2 solicitations (1 open · 1 closed)

4420-01-260-1973

COOLER,FLUID,INDUSTRIAL

Open · closes in 7d 1 units

1 solicitation (1 open · 0 closed)

4420-01-445-6093

HEATER,FLUID,INDUSTRIAL

Open · closes in 7d 2 units

1 solicitation (1 open · 0 closed)

4420-01-563-4575

COOLER,FLUID,INDUSTRIAL

Open · closes in 7d 11 units

1 solicitation (1 open · 0 closed)

4420-01-504-6304

TIGHTENING BOLT AY

Open · closes in 7d 12 units

1 solicitation (1 open · 0 closed)

4420-01-353-3038

BAFFLE,FLUID COOLER,INDUSTRIAL

Open · closes in 7d 54 units

1 solicitation (1 open · 0 closed)

4420-01-280-9029

CORE ASSEMBLY,FLUID COOLER

Open · closes in 7d 1 units

1 solicitation (1 open · 0 closed)

4420-01-114-5941

TUBE BUNDLE ASSEMBLY

Open · closes in 7d 1 units

1 solicitation (1 open · 0 closed)

4420-01-260-2009

BONNET,FLUID COOLER,INDUSTRIAL

Closed · last Sep 3, 2026 — units

1 solicitation (0 open · 1 closed)

4420-15-019-8664

COOLER, FLUID, INDUST

Closed · last Sep 3, 2026 — units

2 solicitations (0 open · 2 closed)

4420-01-481-8652

COOLER,FLUID,INDUSTRIAL

Closed · last Sep 3, 2026 — units

1 solicitation (0 open · 1 closed)

4420-01-144-2422

CORE ASSEMBLY,FLUID COOLER

Closed · last Sep 2, 2026 — units

2 solicitations (0 open · 2 closed)

4420-01-551-8926

CORE ASSEMBLY,FLUID HEATER,INDUS

Closed · last Aug 31, 2026 — units

1 solicitation (0 open · 1 closed)

4420-01-327-9871

BONNET,FLUID COOLER,INDUSTRIAL

Closed · last Aug 31, 2026 — units

1 solicitation (0 open · 1 closed)

4420-01-376-1115

COOLER,FLUID,INDUSTRIAL

Closed · last Aug 31, 2026 — units

1 solicitation (0 open · 1 closed)

4420-01-327-8376

CORE ASSEMBLY,FLUID COOLER

Closed · last Aug 31, 2026 — units

2 solicitations (0 open · 2 closed)

4420-01-464-6311

COOLER,FLUID,INDUSTRIAL

Closed · last Aug 30, 2026 — units

1 solicitation (0 open · 1 closed)

4420-01-374-7946

COOLER,FLUID,INDUSTRIAL

Closed · last Aug 28, 2026 — units

2 solicitations (0 open · 2 closed)

4420-01-505-0114

BAFFLE,FLUID COOLER,INDUSTRIAL

Closed · last Aug 24, 2026 — units

1 solicitation (0 open · 1 closed)

4420-01-725-0846

HEAT EXCHANGER,FLUID TO AIR

Closed · last Aug 21, 2026 — units

1 solicitation (0 open · 1 closed)

4420-00-006-1963

REPAIR PARTS,CONDENSER

Closed · last Aug 21, 2026 — units

1 solicitation (0 open · 1 closed)

4420-01-338-9731

CORE ASSEMBLY,FLUID COOLER

Closed · last Aug 20, 2026 — units

2 solicitations (0 open · 2 closed)

4420-01-504-5631

CORE ASSEMBLY,FLUID COOLER

Closed · last Aug 20, 2026 — units

1 solicitation (0 open · 1 closed)

4420-01-612-5942

BAFFLE,FLUID COOLER,INDUSTRIAL

Closed · last Aug 20, 2026 — units

1 solicitation (0 open · 1 closed)

4420-01-587-9429

CORE ASSEMBLY,FLUID COOLER

Closed · last Aug 20, 2026 — units

1 solicitation (0 open · 1 closed)

4420-01-263-3992

COOLER,FLUID,INDUSTRIAL

Closed · last Aug 17, 2026 — units

1 solicitation (0 open · 1 closed)

4420-01-370-8462

PLATE,FLUID COOLER

Closed · last Aug 17, 2026 — units

1 solicitation (0 open · 1 closed)

4420-01-438-4834

COOLER,FLUID,INDUSTRIAL

Closed · last Aug 17, 2026 — units

1 solicitation (0 open · 1 closed)

4420-01-506-8627

CORE ASSEMBLY,FLUID HEATER,INDUS

Closed · last Aug 17, 2026 — units

1 solicitation (0 open · 1 closed)

4420-15-179-6457

COOLER, FLUID, INDUST

Closed · last Aug 17, 2026 — units

1 solicitation (0 open · 1 closed)

4420-01-235-0677

TUBE SHEET,FLUID COOLER,INDUSTRI

Closed · last Aug 17, 2026 — units

2 solicitations (0 open · 2 closed)

4420-01-578-2232

COOLER,FLUID,INDUSTRIAL

Closed · last Aug 17, 2026 — units

1 solicitation (0 open · 1 closed)

4420-01-400-2671

ROD SUBASSY,PROTECTOR

Closed · last Aug 13, 2026 — units

1 solicitation (0 open · 1 closed)

4420-01-487-5667

COOLER,FLUID,INDUSTRIAL

Closed · last Aug 13, 2026 — units

1 solicitation (0 open · 1 closed)