The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-126-5664, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Honeywell International Inc Div Aerospace-South Bend (bendix Dr). Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-126-5664 |
| Primary Part Number | 2626979 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Honeywell International Inc Div Aerospace-South Bend (bendix Dr) |
| Status | ACTIVE |
| FSC Application Data | FUEL VALVE,ENGINE,AIRCRAFT |
| First Step Diameter | 0.7400 INCHES NOMINAL IN |
| End Diameter | 0.4900 INCHES NOMINAL IN |
| Second End Diameter | 0.6500 INCHES NOMINAL IN |
| Distance From End to First Step | 0.1250 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| First Step Length | 0.0600 INCHES NOMINAL IN |
| Chamfer Angle in Deg | 45.0 |
| Bore Diameter | 0.2500 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 |
NSN 5340-00-126-5664 is a Seat,helical Compression Spring, manufactured by Honeywell International Inc Div Aerospace-South Bend (bendix Dr), classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-126-5664 has 2 manufacturer part numbers on file: 2626979 (Honeywell International Inc Div Aerospace-South Bend (bendix Dr)), 2626979 (Boeing Distribution Services X, Inc.).
Key specifications for 2626979: Overall Height: 0.2500 INCHES NOMINAL IN; FSC Application Data: FUEL VALVE,ENGINE,AIRCRAFT; First Step Diameter: 0.7400 INCHES NOMINAL IN; End Diameter: 0.4900 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.