The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-974-0186, 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 9 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. 3 items share 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 | 5340-00-974-0186 |
| Primary Part Number | 570541 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| FSC Application Data | FUEL CONTROL MAIN,TURBINE ENGINE |
| First Step Diameter | 0.4560 INCHES NOMINAL IN |
| Material Hardness Rating | 302.0 ROCKWELL C MINIMUM AND 372.0 ROCKWELL C MAXIMUM |
| End Diameter | 0.2600 INCHES MINIMUM AND 0.2900 INCHES MAXIMUM IN |
| Distance From End to First Step | 0.0500 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Spherical Seat Top Radius | 0.2400 INCHES NOMINAL IN |
| Material | STEEL |
| 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 |
|---|---|
| 570541 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
NSN 5340-00-974-0186 is a Seat,helical Compression Spring, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-974-0186 has 1 manufacturer part number on file: 570541 (Hamilton Sundstrand Corporation Dba Collins Aerospace).
3 possible matches (shared part number, not a government interchangeability claim): 4320-01-185-1823, 5340-01-236-2061, 5120-01-359-2811. Verify interchangeability with system specifications before substitution.
Key specifications for 570541: Overall Height: 0.0800 INCHES NOMINAL IN; FSC Application Data: FUEL CONTROL MAIN,TURBINE ENGINE; First Step Diameter: 0.4560 INCHES NOMINAL IN; Material Hardness Rating: 302.0 ROCKWELL C MINIMUM AND 372.0 ROCKWELL C MAXIMUM. 9 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.