The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-531-6641, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Boeing Distribution Services X, Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-531-6641 |
| Primary Part Number | S9404-43 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Boeing Distribution Services X, Inc. |
| Status | ACTIVE |
| End Diameter | 0.5700 INCHES MINIMUM AND 0.5800 INCHES MAXIMUM IN |
| Distance From End to First Step | 0.0700 INCHES MINIMUM AND 0.0800 INCHES MAXIMUM IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE |
| Counterbore Length | 0.0300 INCHES MINIMUM AND 0.0500 INCHES MAXIMUM IN |
| Bore Diameter | 0.5050 INCHES MINIMUM AND 0.5150 INCHES MAXIMUM IN |
| Material | STEEL COMP 202 OR STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 309 OR STEEL COMP 310 OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 317 OR STEEL COMP 321 OR STEEL COMP 322 OR STEEL COMP 324 OR STEEL COMP 347 OR STEEL COMP 633 OR STEEL COMP 634 OR STEEL COMP 403 OR STEEL COMP 405 OR STEEL COMP 410 OR STEEL COMP 414 OR STEEL COMP 416 OR STEEL COMP 416SE OR STEEL COMP 420 OR STEEL COMP 430 OR STEEL COMP 430F OR STEEL COMP 430FSE OR STEEL COMP 431 OR STEEL COMP 440A OR STEEL COMP 440B OR STEEL COMP 440C OR STEEL COMP 440F OR STEEL COMP 440FSE OR STEEL COMP 446 A |
| 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 |
|---|---|
| S9404-43 | Boeing Distribution Services X, Inc. (USA) |
| Reference | Meaning |
|---|---|
| S9404-43 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-01-531-6641 is a Seat,helical Compression Spring, manufactured by Boeing Distribution Services X, Inc., classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-531-6641 has 1 manufacturer part number on file: S9404-43 (Boeing Distribution Services X, Inc.).
Key specifications for S9404-43: Overall Height: 0.1100 INCHES MINIMUM AND 0.1300 INCHES MAXIMUM IN; End Diameter: 0.5700 INCHES MINIMUM AND 0.5800 INCHES MAXIMUM IN; Distance From End to First Step: 0.0700 INCHES MINIMUM AND 0.0800 INCHES MAXIMUM IN; Design Type: SOLID. 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.