The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-016-1028, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road). 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-016-1028 |
| Primary Part Number | 664429 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) |
| Status | ACTIVE |
| First Step Diameter | 0.7800 INCHES MINIMUM AND 0.7900 INCHES MAXIMUM IN |
| Material Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM |
| End Diameter | 0.4520 INCHES NOMINAL IN |
| Distance From End to First Step | 0.1350 INCHES MINIMUM AND 0.1450 INCHES MAXIMUM IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Second Step Diameter | 0.9900 INCHES MINIMUM AND 1.0100 INCHES MAXIMUM IN |
| First Step Length | 0.0800 INCHES MINIMUM AND 0.0900 INCHES MAXIMUM IN |
| Bore Diameter | 0.6100 INCHES MINIMUM AND 0.6300 INCHES MAXIMUM 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 |
|---|---|
| 664429 PRIMARY | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) (USA) |
| Reference | Meaning |
|---|---|
| 664429 | 5/9 Secondary reference U.S. Government activity |
NSN 5340-00-016-1028 is a Seat,helical Compression Spring, manufactured by Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road), classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-016-1028 has 1 manufacturer part number on file: 664429 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)).
Key specifications for 664429: Overall Height: 0.2650 INCHES MINIMUM AND 0.2750 INCHES MAXIMUM IN; First Step Diameter: 0.7800 INCHES MINIMUM AND 0.7900 INCHES MAXIMUM IN; Material Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 47.0 ROCKWELL C MAXIMUM; End Diameter: 0.4520 INCHES NOMINAL IN. 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.