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.

Open solicitations

Closing within 7 days

309

Total open quantity

127

Tracked all-time (107 closed)

Closing dates and quantities

Closing calendar

What closes when? Solicitations by closing date for the next 30 days.

Closes within 7 days
Closes later

Counts as of Nov 6, 2026. Weekends are near zero because DLA sets weekday deadlines.

Bid-window map

Which open solicitations are large, and how long is left? One mark per solicitation.

Coded for competition
Coded for a named source
Not coded

Open parts

4420-01-072-1954

COOLER,FLUID,INDUSTRIAL

Open · closes in 3d 3 units Named source

1 solicitation (1 open · 0 closed)

4420-01-278-7358

CORE ASSEMBLY,FLUID HEATER,INDUS

Open · closes in 3d 1 units Named source

1 solicitation (1 open · 0 closed)

4420-01-506-8627

CORE ASSEMBLY,FLUID HEATER,INDUS

Open · closes in 3d 10 units Named source

2 solicitations (1 open · 1 closed)

4420-01-618-0637

HEATER,FLUID,INDUSTRIAL

Open · closes in 3d 6 units Named source

1 solicitation (1 open · 0 closed)

4420-01-411-2447

COOLER,FLUID,INDUSTRIAL

Open · closes in 3d 1 units Competed

2 solicitations (1 open · 1 closed)

4420-01-679-5886

CORE ASSEMBLY,FLUID COOLER

Open · closes in 3d 24 units Named source

2 solicitations (1 open · 1 closed)

4420-01-551-8926

CORE ASSEMBLY,FLUID HEATER,INDUS

Open · closes in 3d 1 units Named source

3 solicitations (1 open · 2 closed)

4420-01-723-0201

HEATER,FLUID,INDUSTRIAL

Open · closes in 3d 1 units Competed

1 solicitation (1 open · 0 closed)

4420-01-374-7944

COOLER,FLUID,INDUSTRIAL

Open · closes in 3d 8 units Named source

4 solicitations (2 open · 2 closed)

4420-01-389-9046

CORE ASSEMBLY,FLUID COOLER

Open · closes in 3d 1 units Named source

2 solicitations (1 open · 1 closed)

4420-99-429-1675

COOLER, FLUID, INDUST

Open · closes in 3d 21 units

4 solicitations (1 open · 3 closed)

4420-01-456-4333

COOLER,FLUID,INDUSTRIAL

Open · closes in 7d 16 units Named source

2 solicitations (1 open · 1 closed)

4420-01-504-6304

TIGHTENING BOLT AY

Open · closes in 7d 21 units Named source

2 solicitations (1 open · 1 closed)

4420-01-612-5942

BAFFLE,FLUID COOLER,INDUSTRIAL

Open · closes in 10d 186 units Named source

3 solicitations (1 open · 2 closed)

4420-01-362-9388

COOLER,FLUID,INDUSTRIAL

Open · closes in 10d 6 units Named source

1 solicitation (1 open · 0 closed)

4420-01-375-8760

COOLER,FLUID,INDUSTRIAL

Open · closes in 10d 3 units Named source

3 solicitations (1 open · 2 closed)

4420-01-504-9052

TIGHTENING BOLT AY

Closed · last Nov 5, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-263-3992

COOLER,FLUID,INDUSTRIAL

Closed · last Nov 5, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4420-01-319-7902

BAFFLE,FLUID COOLER,INDUSTRIAL

Closed · last Nov 5, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4420-01-170-7102

COOLER,FLUID,INDUSTRIAL

Closed · last Oct 30, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4420-01-374-7945

COOLER,FLUID,INDUSTRIAL

Closed · last Oct 30, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-248-1338

CORE ASSEMBLY,FLUID COOLER

Closed · last Oct 28, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4420-01-141-5989

HEAT EXCHANGER

Closed · last Oct 26, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-505-0114

BAFFLE,FLUID COOLER,INDUSTRIAL

Closed · last Oct 26, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4420-01-225-0784

COOLER,FLUID,INDUSTRIAL

Closed · last Oct 26, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-119-7347

COVER,CONDENSER

Closed · last Oct 26, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4420-01-181-1821

HEAD ASSEMBLY,LOWER

Closed · last Oct 20, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-374-7946

COOLER,FLUID,INDUSTRIAL

Closed · last Oct 19, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4420-01-685-3773

HEAT EXCHANGER,FLUID TO AIR

Closed · last Oct 19, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-667-4587

HEATER,FLUID,INDUSTRIAL

Closed · last Oct 16, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4420-01-255-9070

CORE ASSEMBLY,FLUID COOLER

Closed · last Oct 16, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-440-9414

CORE ASSEMBLY,FLUID COOLER

Closed · last Oct 16, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-361-5928

CORE ASSEMBLY,FLUID COOLER

Closed · last Oct 16, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-163-7335

COOLER,FLUID,INDUSTRIAL

Closed · last Oct 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-15-019-8664

COOLER, FLUID, INDUST

Closed · last Oct 14, 2026 — units

3 solicitations (0 open · 3 closed)

4420-01-202-5749

CORE ASSEMBLY,FLUID HEATER,INDUS

Closed · last Oct 14, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4420-01-134-6620

COOLER,FLUID,INDUSTRIAL

Closed · last Oct 13, 2026 — units Competed

2 solicitations (0 open · 2 closed)

4420-01-299-3899

COOLING COIL,AIR,DUCT TYPE

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-588-6127

BAFFLE,FLUID COOLER,INDUSTRIAL

Closed · last Oct 13, 2026 — units Competed

1 solicitation (0 open · 1 closed)

4420-01-667-9440

HEATER,FLUID,INDUSTRIAL

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-578-2232

COOLER,FLUID,INDUSTRIAL

Closed · last Oct 13, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4420-01-195-6972

HEATER,FLUID,INDUSTRIAL

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-520-8773

COOLER,FLUID,INDUSTRIAL

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-493-2624

COOLER,FLUID,INDUSTRIAL

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-12-395-7443

HEATER, FLUID, INDUSTRIA

Closed · last Oct 13, 2026 — units

1 solicitation (0 open · 1 closed)

4420-01-394-8144

COOLER,FLUID,INDUSTRIAL

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-482-0294

CORE ASSEMBLY,FLUID COOLER

Closed · last Oct 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-117-5449

EDUCTOR-JET

Closed · last Oct 8, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-216-9384

SHELL,FLUID COOLER,INDUSTRIAL

Closed · last Oct 5, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-483-0391

COOLER,FLUID,INDUSTRIAL

Closed · last Oct 5, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-376-1114

COOLER,FLUID,INDUSTRIAL

Closed · last Oct 2, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-323-1813

CORE ASSEMBLY,FLUID COOLER

Closed · last Oct 1, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-559-8357

COOLER,FLUID,INDUSTRIAL

Closed · last Oct 1, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-524-4875

COOLER,FLUID,INDUSTRIAL

Closed · last Sep 30, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-00-006-1963

REPAIR PARTS,CONDENSER

Closed · last Sep 28, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4420-01-307-8883

BONNET,FLUID COOLER,INDUSTRIAL

Closed · last Sep 25, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-99-736-3099

COOLER, FLUID, INDUSTRIA

Closed · last Sep 25, 2026 — units

1 solicitation (0 open · 1 closed)

4420-01-100-0395

COOLER,FLUID,INDUSTRIAL

Closed · last Sep 23, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-596-7202

HEAT EXCHANGER WELDMENT

Closed · last Sep 21, 2026 — units

1 solicitation (0 open · 1 closed)

4420-01-306-6440

HEATER,FLUID,INDUSTRIAL

Closed · last Sep 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-260-1973

COOLER,FLUID,INDUSTRIAL

Closed · last Sep 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-353-3038

BAFFLE,FLUID COOLER,INDUSTRIAL

Closed · last Sep 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-280-9029

CORE ASSEMBLY,FLUID COOLER

Closed · last Sep 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-238-6935

RESERVOIR,COOLING U

Closed · last Sep 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-130-3428

COOLER FLUID

Closed · last Sep 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-445-6093

HEATER,FLUID,INDUSTRIAL

Closed · last Sep 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-563-4575

COOLER,FLUID,INDUSTRIAL

Closed · last Sep 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-114-5941

TUBE BUNDLE ASSEMBLY

Closed · last Sep 14, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-101-5902

COOLER,FLUID,INDUSTRIAL

Closed · last Sep 11, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-260-2009

BONNET,FLUID COOLER,INDUSTRIAL

Closed · last Sep 3, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-481-8652

COOLER,FLUID,INDUSTRIAL

Closed · last Sep 3, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-144-2422

CORE ASSEMBLY,FLUID COOLER

Closed · last Sep 2, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4420-01-327-9871

BONNET,FLUID COOLER,INDUSTRIAL

Closed · last Aug 31, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-376-1115

COOLER,FLUID,INDUSTRIAL

Closed · last Aug 31, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-327-8376

CORE ASSEMBLY,FLUID COOLER

Closed · last Aug 31, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4420-01-464-6311

COOLER,FLUID,INDUSTRIAL

Closed · last Aug 30, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-725-0846

HEAT EXCHANGER,FLUID TO AIR

Closed · last Aug 21, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-338-9731

CORE ASSEMBLY,FLUID COOLER

Closed · last Aug 20, 2026 — units Named source

2 solicitations (0 open · 2 closed)

4420-01-504-5631

CORE ASSEMBLY,FLUID COOLER

Closed · last Aug 20, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-587-9429

CORE ASSEMBLY,FLUID COOLER

Closed · last Aug 20, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-370-8462

PLATE,FLUID COOLER

Closed · last Aug 17, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-438-4834

COOLER,FLUID,INDUSTRIAL

Closed · last Aug 17, 2026 — units Competed

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 Named source

2 solicitations (0 open · 2 closed)

4420-01-400-2671

ROD SUBASSY,PROTECTOR

Closed · last Aug 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

4420-01-487-5667

COOLER,FLUID,INDUSTRIAL

Closed · last Aug 13, 2026 — units Named source

1 solicitation (0 open · 1 closed)

Cite this page

Citation

NSN Explorer. "Heat Exchangers and Steam Condensers FSC 4420." nsnexplorer.com, https://nsnexplorer.com/open/4420/. Data as of November 6, 2026.

Link

https://nsnexplorer.com/open/4420/