S3802-66970S21L

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Federal Supply Group

Plumbing, Heating, and Waste Disposal Equipment

Federal Supply Classification

4520 Space and Water Heating Equipment

National Stock Number

4520-00-273-1060

Item Name Code

07531

Assigment Date

01/01/1963 (63 years ago)

A heat transferring unit utilizing a separate source of steam or hot water as the heat transfer medium. It consists of finned parallel tubes joined together by a header or headers and is designed for installation in the ducts of a forced air circulating system. It may be provided with a flanged outer casing to facilitate mounting of the unit in planned or existing duct work. Circulation of the heated air is achieved by use of a blower or fan not integral with the heating unit.

ventilation duct mounting type, 6.000 inches duct width, hot water or steam heat medium type, 35.0 pounds per square inch gage maximum pressure limit, 3.250 inches duct height

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Mounting Type: ventilation duct
Heat Medium Type: hot water or steam
Maximum Pressure Limit: 35.0 pounds per square inch gage
Duct Height: 3.250 inches
Duct Width: 6.000 inches
Heat Outlet Quantity: 1
Heat Delivery Direction: horizontal
Heat Discharge Outlet Type: stationary
Heat Directing Device: radial diffuser-vertical vanes
Width: 13.750 inches nominal
Depth: 5.000 inches nominal
Heating Element Type: hot water coil or steam coil
Inclosure Material: steel
Special Features: tube has 36 fins per ft; conforms to mil-h-16235c
Height: 6.250 inches nominal
Surface Treatment: zinc

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
NSTDSIZES21L	Duct Type Ventilation Heater
S21L	Duct Type Ventilation Heater
S3802-66970-21L	Duct Type Ventilation Heater
S3802-66970S21L	Duct Type Ventilation Heater

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 4520-00-273-1060?

The FSCG of the NSN 4520-00-273-1060 is 4520

Does the NSN 4520-00-273-1060 have a Schedule B code assigned?

Yes, the Schedule B code is 7322900000

Does NSN 4520-00-273-1060 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 4520-00-273-1060 contain precious materials?

Precious metal content is unknown

Does NSN 4520-00-273-1060 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 4520-00-273-1060 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963