# NSN 4520-00-273-1258: Heater, Ventilation, Duct Type

NSN 4520-00-273-1258 (also written 4520002731258; NIIN 00-273-1258) is a heater, ventilation, duct type in Federal Supply Class 4520, Space and Water Heating Equipment. 4 manufacturer part numbers from 3 suppliers are on record. It was last purchased in Oct 2026.

## Identification

- NSN: 4520-00-273-1258 (4520002731258)
- NIIN: 00-273-1258 (002731258)
- Item name: HEATER,VENTILATION,DUCT TYPE
- Federal Supply Class: [FSC 4520 Space and Water Heating Equipment](https://nsnexplorer.com/fsc/4520/)
- Federal Supply Group: [FSG 45](https://nsnexplorer.com/group/45/)
- Acquisition method suffix code: AMSC T: handled under qualified products list procedures. (observed 2026-10-10)
- Acquisition method code: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| ABAU | DUCT WIDTH | INCHES 30.000 |
| BDXJ | HEATING ELEMENT TYPE | HOT WATER COIL OR STEAM COIL |
| CQSJ | INCLOSURE MATERIAL | STEEL |
| AEJZ | DEPTH | INCHES NOMINAL 7.000 |
| AAXX | MOUNTING TYPE | VENTILATION DUCT |
| ABAW | HEAT OUTLET QUANTITY | 1 |
| ABGL | WIDTH | INCHES NOMINAL 39.250 |
| ABAY | HEAT DISCHARGE OUTLET TYPE | STATIONARY |
| ABAM | HEAT MEDIUM TYPE | HOT WATER OR STEAM |
| ABAN | MAXIMUM PRESSURE LIMIT | POUNDS PER SQUARE INCH GAGE 35.0 |
| ABAT | DUCT HEIGHT | INCHES 9.250 |
| FEAT | SPECIAL FEATURES | TUBE HAS 60 FINS PER FT.,CONFORMS TO MIL-H-16235C |
| HGTH | HEIGHT | INCHES NOMINAL 12.250 |
| SFTT | SURFACE TREATMENT | ZINC |
| ABAZ | HEAT DIRECTING DEVICE | RADIAL DIFFUSER-VERTICAL VANES |
| ABAX | HEAT DELIVERY DIRECTION | HORIZONTAL |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| MIL-H-16235 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| NSTDSIZET28M | 41197 | MODINE MFG CO | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| S3802-66970-28M | 80064 | NAVAL SHIP SYSTEMS COMMAND | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| S3802-66970T28M | 80064 | NAVAL SHIP SYSTEMS COMMAND | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Price history

Newest first.

| Date | Unit price | Quantity | Supplier | Agency | Source |
| --- | --- | --- | --- | --- | --- |
| 2026-10-20 | $3,322.00 | 8 | ENGINEERED COIL COMPANY DBA ENGINEERED COIL CO DIV DRS MARLO COIL | — | [record](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4520002731258) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-10-20 | [SPE8E927P0074](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4520002731258) | HEATER, VENTILATION, | ENGINEERED COIL COMPANY DBA ENGINEERED COIL CO DIV DRS MARLO COIL | $26,576.00 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4520002731258&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4520002731258
- AMSC record: https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/
- USAspending contract actions (each award above links to its record)
- All data is public U.S. government data; every row above links to its source record where one exists.

Canonical page: https://nsnexplorer.com/nsn/4520-00-273-1258/
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