# NSN 5640-01-146-1898: Insulation Pipe Fitting Covering

NSN 5640-01-146-1898 (also written 5640011461898; NIIN 01-146-1898) is an insulation pipe fitting covering in Federal Supply Class 5640, Wallboard, Building Paper, and Thermal Insulation Materials. 3 manufacturer part numbers from 3 suppliers are on record. The government has 1 open solicitation for it.

## Identification

- NSN: 5640-01-146-1898 (5640011461898)
- NIIN: 01-146-1898 (011461898)
- Item name: INSULATION PIPE FITTING COVERING
- Federal Supply Class: [FSC 5640 Wallboard, Building Paper, and Thermal Insulation Materials](https://nsnexplorer.com/fsc/5640/)
- Federal Supply Group: [FSG 56](https://nsnexplorer.com/group/56/)
- Acquisition method suffix code: AMSC G: the government has a complete data package and the rights to use it. (observed 2026-11-01)
- Acquisition method code: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AARM | LAYER QUANTITY | 3 |
| AARN | FABRICATION METHOD | COMPRESSED |
| AARQ | FLAMMABILITY RATING | NOT RATED |
| AARU | INSULATION THICKNESS | INCHES MINIMUM 0.320 AND INCHES MAXIMUM 0.440 |
| AARY | END CONNECTION FITTING DESIGN ACCOMMODATED | WELDED FITTING |
| FEAT | SPECIAL FEATURES | LENGTH 14.800 IN. MIN AND 14.920 IN. MAX; INSIDE DIAMETER 6.500 IN. MIN AND 6.560 IN. MAX |
| MATT | MATERIAL | LOCATION NOT OTHERWISE SPECIFIED SILICA FIBER |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | LOCATION NOT OTHERWISE SPECIFIED ASSN STD SINGLE MATERIAL RESPONSE A-S 3680 |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 12275889 | 19207 | U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 12275889 | 54787 | THERMAL STRUCTURES, INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 5640011461898 | A00AM | E.C.A ETABLISSEMENT CENTRAL DES APPROVISIONNEMENTS DES FORCES ARMEES ROYALES | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Open solicitations

| Solicitation | Quantity | Closes | Link |
| --- | --- | --- | --- |
| SPE8E6-27-T-0463 | 6 | 2026-11-09 | [DIBBS](https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5640011461898&category=nsn) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5640011461898&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5640011461898
- 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/5640-01-146-1898/
JSON: https://nsnexplorer.com/api/nsn/5640-01-146-1898.json