# NSN 5310-00-377-6204: Washer, Key

NSN 5310-00-377-6204 (also written 5310003776204; NIIN 00-377-6204) is a washer, key in Federal Supply Class 5310, Nuts and Washers. 3 manufacturer part numbers from 3 suppliers are on record. It was last purchased in Aug 2026.

## Identification

- NSN: 5310-00-377-6204 (5310003776204)
- NIIN: 00-377-6204 (003776204)
- Item name: WASHER,KEY
- Federal Supply Class: [FSC 5310 Nuts and Washers](https://nsnexplorer.com/fsc/5310/)
- Federal Supply Group: [FSG 53](https://nsnexplorer.com/group/53/)
- Acquisition method suffix code: AMSC C: needs engineering source approval; other sources must qualify first. (observed 2026-11-01)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | OVERALL ASSN STD SINGLE MATERIAL RESPONSE A-S5510 |
| AAUB | HOLE DIAMETER | INCHES MINIMUM 3.850 AND INCHES MAXIMUM 3.870 |
| ABLC | EXTERNAL STRAIGHT KEY WIDTH | INCHES MINIMUM 0.535 AND INCHES MAXIMUM 0.545 |
| ABMR | INTERNAL KEY QUANTITY | 10 |
| ABKV | OUTSIDE DIAMETER | INCHES MINIMUM 4.060 AND INCHES MAXIMUM 4.080 |
| ABLX | OVERALL DISTANCE INCLUDING KEYS | INCHES MINIMUM 4.340 AND INCHES MAXIMUM 4.360 |
| ABMQ | EXTERNAL KEY QUANTITY | 11 |
| ABLQ | DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY | INCHES MINIMUM 1.760 AND INCHES MAXIMUM 1.770 |
| ABPX | MATERIAL THICKNESS | INCHES MINIMUM 0.051 AND INCHES MAXIMUM 0.054 |
| STYL | STYLE DESIGNATOR | — |
| MATT | MATERIAL | OVERALL STEEL COMP 321 |
| ABLJ | INTERNAL STRAIGHT KEY WIDTH | INCHES MINIMUM 0.535 AND INCHES MAXIMUM 0.545 |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 4010238 | 11449 | TURBO POWER & MARINE SYSTEM INC SUB OF UNITED TECHNOLOGIES CORP | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 4010238 | 77445 | RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 5310PL0723169 | 9009H | JEDNOLITY INDEKS MATERIALOWY - UNIFORM MATERIAL INDEX | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-08-25 | [SPETA626P0294](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310003776204) | WASHER, KEY | ALAMO AIRCRAFT, LTD. | $1,470.00 |
| 2026-08-20 | [SPE4AX25D9424/SPE4AX26F395A](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310003776204) | WASHER, KEY | RTX CORPORATION DIV PRATT & WHITNEY | $1,881.76 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5310003776204&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310003776204
- 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/5310-00-377-6204/
JSON: https://nsnexplorer.com/api/nsn/5310-00-377-6204.json