The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-375-8304, 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 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5340-00-375-8304 |
| Primary Part Number | 549343 |
| 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 | 0.9850 INCHES NOMINAL IN |
| End Diameter | 0.7630 INCHES NOMINAL IN |
| Distance From End to First Step | 0.1260 INCHES NOMINAL IN |
| Design Type | SPLIT |
| Style Designator | SEAT |
| Surface Treatment | CADMIUM |
| Bore Diameter | 0.6250 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 |
|---|---|
| 549343 | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) (USA) |
| Reference | Meaning |
|---|---|
| 4824-3113743PC549343 | 5/2 Secondary reference U.S. Government activity |
| 4824-3130110REVCPCALL | 3/2 Design control — primary reference U.S. Government activity |
| 4824-3113742PC549343 | 5/2 Secondary reference U.S. Government activity |
| 549343 | 5/9 Secondary reference Allied-Signal Inc Dba Allied-Signal Aerospace Co Electrodynamics Div |
| 4824-3113741PC549343 | 5/2 Secondary reference U.S. Government activity |
| 4824-3113744PC549343 | 5/2 Secondary reference U.S. Government activity |
| 4824-3113759PC549343 | 5/2 Secondary reference U.S. Government activity |
NSN 5340-00-375-8304 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 5340-00-375-8304 has 1 manufacturer part number on file: 549343 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)).
1 possible match (shared part number, not a government interchangeability claim): 9390-00-950-4980. Verify interchangeability with system specifications before substitution.
Key specifications for 549343: Overall Height: 0.1930 INCHES NOMINAL IN; First Step Diameter: 0.9850 INCHES NOMINAL IN; End Diameter: 0.7630 INCHES NOMINAL IN; Distance From End to First Step: 0.1260 INCHES NOMINAL 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.