# NSN 4820-01-034-5695: Piston

NSN 4820-01-034-5695 (also written 4820010345695; NIIN 01-034-5695) is a piston in Federal Supply Class 4820, Valves, Nonpowered. 1 manufacturer part number from 1 supplier is on record. It was last purchased in Aug 2026.

## Identification

- NSN: 4820-01-034-5695 (4820010345695)
- NIIN: 01-034-5695 (010345695)
- Item name: PISTON
- Federal Supply Class: [FSC 4820 Valves, Nonpowered](https://nsnexplorer.com/fsc/4820/)
- Federal Supply Group: [FSG 48](https://nsnexplorer.com/group/48/)
- Acquisition method suffix code: AMSC C: needs engineering source approval; other sources must qualify first. (observed 2026-11-04)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AGAV | END ITEM IDENTIFICATION | TEMPERATURE AND PRESSURE CONTROLS,AIRCRAFT F5F |
| TEXT | GENERAL CHARACTERISTICS ITEM DESCRIPTION | STEEL AMS 5512 PER HS178,HARDNESS 75.5R15N MAX,HEAT TREAT SPECHS461,MFG SPEC HS5243,1.420 IN. H,INSIDE DIA 1.850 IN. NOM,OUTSIDE DIA 1.930 IN. NOM,CENTER HOLE DIA 0.313 IN. NOM,TWO HOLES EQUALLY SPACED FROMCENTER HOLE 0.190 IN. NOM DIA |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 753663-1 | 73030 | HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-08-17 | [SPE4A125G0027/SPE4A726F1711](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820010345695) | PISTON | HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE | $19,364.62 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820010345695&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820010345695
- 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/4820-01-034-5695/
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