The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-036-5779, 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 6 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. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-036-5779 |
| Primary Part Number | 740478-1 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| First Step Diameter | 1.2410 INCHES MINIMUM AND 1.2430 INCHES MAXIMUM IN |
| End Diameter | 1.0030 INCHES MINIMUM AND 1.0050 INCHES MAXIMUM IN |
| Distance From End to First Step | 0.1100 INCHES MINIMUM AND 0.1200 INCHES MAXIMUM IN |
| Style Designator | SEAT |
| Surface Treatment | ANODIZE |
| Bore Diameter | 0.8000 INCHES NOMINAL IN |
| 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 |
|---|---|
| 740478-1 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
NSN 5340-01-036-5779 is a Seat,helical Compression Spring, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-036-5779 has 1 manufacturer part number on file: 740478-1 (Hamilton Sundstrand Corporation Dba Collins Aerospace).
Key specifications for 740478-1: Overall Height: 0.1350 INCHES MINIMUM AND 0.1550 INCHES MAXIMUM IN; First Step Diameter: 1.2410 INCHES MINIMUM AND 1.2430 INCHES MAXIMUM IN; End Diameter: 1.0030 INCHES MINIMUM AND 1.0050 INCHES MAXIMUM IN; Distance From End to First Step: 0.1100 INCHES MINIMUM AND 0.1200 INCHES MAXIMUM IN. 6 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.