The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-884-9989, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Hamilton Sundstrand Corporation Dba Collins Aerospace. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-884-9989 |
| Primary Part Number | 538108 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| FSC Application Data | PROPELLER,AIRCRAFT,VARIABLE PITCH |
| First Step Diameter | 0.4930 INCHES MINIMUM AND 0.4940 INCHES MAXIMUM IN |
| Material Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| End Diameter | 0.3500 INCHES MINIMUM AND 0.3700 INCHES MAXIMUM IN |
| Distance From End to First Step | 0.0800 INCHES MINIMUM AND 0.0900 INCHES MAXIMUM IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Material Document and Classification | AMS 5610 ASSN STD SINGLE MATERIAL RESPONSE |
| Bore Diameter | 0.2400 INCHES MINIMUM AND 0.2600 INCHES MAXIMUM IN |
| Material | STEEL COMP 416SE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 538108 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
NSN 5340-00-884-9989 is a Seat,helical Compression Spring, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-884-9989 has 1 manufacturer part number on file: 538108 (Hamilton Sundstrand Corporation Dba Collins Aerospace).
1 possible match (shared part number, not a government interchangeability claim): 6750-01-427-5183. Verify interchangeability with system specifications before substitution.
Key specifications for 538108: Overall Height: 0.1200 INCHES NOMINAL IN; FSC Application Data: PROPELLER,AIRCRAFT,VARIABLE PITCH; First Step Diameter: 0.4930 INCHES MINIMUM AND 0.4940 INCHES MAXIMUM IN; Material Hardness Rating: 30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM. 10 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.