The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-062-7440, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is De Havilland Aircraft of Canada Limited. Government technical data includes 11 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.
| Parameter | Value |
|---|---|
| NSN | 5340-00-062-7440 |
| Primary Part Number | C4GM1018-1 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | De Havilland Aircraft of Canada Limited |
| Status | ACTIVE |
| FSC Application Data | RAMP,PASSENGER LOADING,AIRCRAFT |
| First Step Diameter | 0.8400 INCHES NOMINAL IN |
| End Diameter | 0.6800 INCHES NOMINAL IN |
| Distance From End to First Step | 1.2600 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Counterbore Length | 1.2200 INCHES NOMINAL IN |
| Counterbore Diameter | 0.5600 INCHES MINIMUM AND 0.5700 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM |
| Bore Diameter | 0.4530 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 |
| Part Number | Manufacturer |
|---|---|
| C4GM1018-1 PRIMARY | De Havilland Aircraft of Canada Limited (CAN) |
NSN 5340-00-062-7440 is a Seat,helical Compression Spring, manufactured by De Havilland Aircraft of Canada Limited, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-062-7440 has 1 manufacturer part number on file: C4GM1018-1 (De Havilland Aircraft of Canada Limited).
Key specifications for C4GM1018-1: Overall Height: 1.3000 INCHES NOMINAL IN; FSC Application Data: RAMP,PASSENGER LOADING,AIRCRAFT; First Step Diameter: 0.8400 INCHES NOMINAL IN; End Diameter: 0.6800 INCHES NOMINAL IN. 11 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.