The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-366-4038, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corp Electronics and Missiles Div. Government technical data includes 9 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 | 5340-01-366-4038 |
| Primary Part Number | 260572 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Lockheed Martin Corp Electronics and Missiles Div |
| Status | ACTIVE |
| First Step Diameter | 0.8300 INCHES MINIMUM AND 0.8330 INCHES MAXIMUM IN |
| End Diameter | 0.7200 INCHES MINIMUM AND 0.7250 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE |
| Distance From End to First Step | 0.1100 INCHES NOMINAL IN |
| Design Type | SPLIT |
| Style Designator | SEAT |
| Surface Treatment | PASSIVATE |
| Bore Diameter | 0.6920 INCHES MINIMUM AND 0.6970 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 |
|---|---|
| 260572 PRIMARY | Lockheed Martin Corp Electronics and Missiles Div (USA) |
NSN 5340-01-366-4038 is a Seat,helical Compression Spring, manufactured by Lockheed Martin Corp Electronics and Missiles Div, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-366-4038 has 1 manufacturer part number on file: 260572 (Lockheed Martin Corp Electronics and Missiles Div).
Key specifications for 260572: Overall Height: 0.1250 INCHES NOMINAL IN; First Step Diameter: 0.8300 INCHES MINIMUM AND 0.8330 INCHES MAXIMUM IN; End Diameter: 0.7200 INCHES MINIMUM AND 0.7250 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE. 9 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.