# NSN 5340-01-281-8026: Seat, Helical Compression Spring

NSN 5340-01-281-8026 (also written 5340012818026; NIIN 01-281-8026) is a seat, helical compression spring in Federal Supply Class 5340, Hardware, Commercial. 1 manufacturer part number from 1 supplier is on record. No purchases are on record yet.

## Identification

- NSN: 5340-01-281-8026 (5340012818026)
- NIIN: 01-281-8026 (012818026)
- Item name: SEAT,HELICAL COMPRESSION SPRING
- Federal Supply Class: [FSC 5340 Hardware, Commercial](https://nsnexplorer.com/fsc/5340/)
- 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 2026-10-16)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| ABKW | OVERALL HEIGHT | INCHES NOMINAL 1.7500 |
| ABPR | FIRST STEP DIAMETER | INCHES NOMINAL 0.8750 |
| ABPS | FIRST STEP LENGTH | INCHES NOMINAL 0.0600 |
| APGF | DESIGN TYPE | SOLID |
| BBRB | END DIAMETER | INCHES MINIMUM 0.3735 AND INCHES MAXIMUM 0.3745 |
| MATT | MATERIAL | STEEL COMP XM-12 |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | ASSN STD SINGLE MATERIAL RESPONSE A-S 5659 |
| SFTT | SURFACE TREATMENT | LUBRICANT DRY FILM |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MFR REF SINGLE TREATMENT RESPONSE BAC5811 TY4 CL1 FSC- 82918 |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 405-10130-503 | 82918 | THE BOEING COMPANY DIV LEGACY WICHITA | [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=5340012818026&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5340012818026
- 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/5340-01-281-8026/
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