# NSN 4520-00-273-1276: Heater, Ventilation, Duct Type

NSN 4520-00-273-1276 (also written 4520002731276; NIIN 00-273-1276) is a heater, ventilation, duct type in Federal Supply Class 4520, Space and Water Heating Equipment. 5 manufacturer part numbers from 4 suppliers are on record. No purchases are on record yet.

## Identification

- NSN: 4520-00-273-1276 (4520002731276)
- NIIN: 00-273-1276 (002731276)
- 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 |
| --- | --- | --- |
| ABAZ | HEAT DIRECTING DEVICE | RADIAL DIFFUSER-VERTICAL VANES |
| ABAM | HEAT MEDIUM TYPE | HOT WATER OR STEAM |
| BDXJ | HEATING ELEMENT TYPE | HOT WATER COIL OR STEAM COIL |
| ABAX | HEAT DELIVERY DIRECTION | HORIZONTAL |
| ABGL | WIDTH | INCHES NOMINAL 52.750 |
| CQSJ | INCLOSURE MATERIAL | STEEL |
| HGTH | HEIGHT | INCHES NOMINAL 27.250 |
| SFTT | SURFACE TREATMENT | ZINC |
| ABAW | HEAT OUTLET QUANTITY | 1 |
| ABAU | DUCT WIDTH | INCHES 42.000 |
| FEAT | SPECIAL FEATURES | TUBE HAS 90 FINS PER FT.,CONFORMS TO MIL-H-16235C |
| AAXX | MOUNTING TYPE | VENTILATION DUCT |
| ABAY | HEAT DISCHARGE OUTLET TYPE | STATIONARY |
| ABAN | MAXIMUM PRESSURE LIMIT | POUNDS PER SQUARE INCH GAGE 35.0 |
| ABAT | DUCT HEIGHT | INCHES 24.250 |
| AEJZ | DEPTH | INCHES NOMINAL 7.000 |

## 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/) |
| NSTDSIZET35H | 41197 | MODINE MFG CO | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| S3802-66970-35H | 80064 | NAVAL SHIP SYSTEMS COMMAND | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| S3802-66970T35H | 80064 | NAVAL SHIP SYSTEMS COMMAND | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| T35H | 38450 | ENGINEERED COIL COMPANY DBA ENGINEERED COIL CO DIV DRS MARLO COIL | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4520002731276&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4520002731276
- AMSC record: https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/
- 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/4520-00-273-1276/
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