The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-172-9499, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Meggitt Aerospace Limited. Government technical data includes 8 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 | 5340-01-172-9499 |
| Primary Part Number | ACO44054 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Meggitt Aerospace Limited |
| Status | ACTIVE |
| Countersink Angle in Deg | 90.0 |
| First Step Diameter | 0.5850 INCHES MINIMUM AND 0.5880 INCHES MAXIMUM IN |
| End Diameter | 0.3070 INCHES MINIMUM AND 0.3150 INCHES MAXIMUM IN |
| Distance From End to First Step | 0.7320 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Counterbore Diameter | 0.4700 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| ACO44054 PRIMARY | Meggitt Aerospace Limited (GBR) |
NSN 5340-01-172-9499 is a Seat,helical Compression Spring, manufactured by Meggitt Aerospace Limited, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-172-9499 has 1 manufacturer part number on file: ACO44054 (Meggitt Aerospace Limited).
Key specifications for ACO44054: Overall Height: 0.8460 INCHES NOMINAL IN; Countersink Angle in Deg: 90.0; First Step Diameter: 0.5850 INCHES MINIMUM AND 0.5880 INCHES MAXIMUM IN; End Diameter: 0.3070 INCHES MINIMUM AND 0.3150 INCHES MAXIMUM IN. 8 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.