# NSN 4330-01-541-0874: Pneumatic Muffler, Exhaust-Intake

NSN 4330-01-541-0874 (also written 4330015410874; NIIN 01-541-0874) is a pneumatic muffler, exhaust-intake in Federal Supply Class 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. 1 manufacturer part number from 1 supplier is on record. No purchases are on record yet.

## Identification

- NSN: 4330-01-541-0874 (4330015410874)
- NIIN: 01-541-0874 (015410874)
- Item name: PNEUMATIC MUFFLER,EXHAUST-INTAKE
- Federal Supply Class: [FSC 4330 Centrifugals, Separators, and Pressure and Vacuum Filters](https://nsnexplorer.com/fsc/4330/)
- Federal Supply Group: [FSG 43](https://nsnexplorer.com/group/43/)
- Acquisition method suffix code: AMSC R: the government owns neither the data nor the rights, and obtaining them is judged uneconomical. (observed 2026-10-10)
- Acquisition method code: 4

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| ABHP | OVERALL LENGTH | INCHES NOMINAL 1.375 |
| ACQW | INLET CONNECTION TYPE | LOCATION NOT OTHERWISE SPECIFIED THREADED |
| ADAV | OVERALL DIAMETER | INCHES NOMINAL 0.562 |
| AQXP | INLET CONNECTION QUANTITY | 1 |
| ARND | MUFFLER DESIGN | STRAIGHT THROUGH |
| ARNG | BODY SHAPE | TAPERED |
| ARNJ | INLET LOCATION | LOCATED IN END SECTION OF BODY |
| ARNX | INLET THREAD SERIES DESIGNATOR | LOCATION NOT OTHERWISE SPECIFIED NPT |
| FEAT | SPECIAL FEATURES | 0.250 IN. NPT MALE CONNECTION |
| MATT | MATERIAL | LOCATION NOT OTHERWISE SPECIFIED COPPER ALLOY AND STEEL |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 4450K2 | 39428 | MCMASTER-CARR SUPPLY CO | [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=4330015410874&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4330015410874
- 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/4330-01-541-0874/
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