# NSN 5310-00-177-0978: Washer, Flat

NSN 5310-00-177-0978 (also written 5310001770978; NIIN 00-177-0978) is a washer, flat in Federal Supply Class 5310, Nuts and Washers. 2 manufacturer part numbers from 2 suppliers are on record. It was last purchased in Sep 2026.

## Identification

- NSN: 5310-00-177-0978 (5310001770978)
- NIIN: 00-177-0978 (001770978)
- Item name: WASHER,FLAT
- 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 G: the government has a complete data package and the rights to use it. (observed 2026-10-10)
- Acquisition method code: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| ABNM | THICKNESS | INCHES MINIMUM 0.083 AND INCHES MAXIMUM 0.093 |
| ADAV | OVERALL DIAMETER | INCHES MINIMUM 0.865 AND INCHES MAXIMUM 0.875 |
| MATT | MATERIAL | OVERALL STEEL |
| AAUB | HOLE DIAMETER | INCHES MINIMUM 0.320 AND INCHES MAXIMUM 0.343 |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | OVERALL FED SPEC SINGLE TREATMENT RESPONSE QQ--416,TY 2,CL 2 |
| SFTT | SURFACE TREATMENT | OVERALL CADMIUM |
| ABMW | PERIPHERAL SHAPE STYLE | — |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | OVERALL MIL SPEC SINGLE MATERIAL RESPONSE -IL-S-7952 OR FED SPEC SINGLE MATERIAL RESPONSE QQ-S-698 |
| AAGR | CROSS-SECTIONAL SHAPE STYLE | — |
| ABMX | CENTER HOLE SHAPE STYLE | — |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| C637635 | 02614 | CASCADE CORP | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| MS25440-5 | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-09-28 | [SPE4A626PYY22](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310001770978) | WASHER, FLAT | BOEING DISTRIBUTION SERVICES X, INC. | $968.24 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5310001770978&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5310001770978
- 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/5310-00-177-0978/
JSON: https://nsnexplorer.com/api/nsn/5310-00-177-0978.json