The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-355-0272, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 9 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 | 5340-01-355-0272 |
| Primary Part Number | 5598272-1 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| End Diameter | 1.1500 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-A-8625 TY 3 CL 1 MIL SPEC SINGLE TREATMENT RESPONSE |
| Distance From End to First Step | 0.3900 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Material Document and Classification | QQ-A-250/11, T651 FED SPEC SINGLE MATERIAL RESPONSE |
| Surface Treatment | ANODIZE |
| Bore Diameter | 0.9400 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 6061 |
| 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 5340-01-355-0272 is a Seat,helical Compression Spring, manufactured by Naval Sea Systems Command, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-355-0272 has 2 manufacturer part numbers on file: 5598272-1 (Naval Sea Systems Command), 5598272-1 (Lockheed Martin Corporation Div Rotary and Mission Systems).
Key specifications for 5598272-1: Overall Height: 0.7300 INCHES NOMINAL IN; End Diameter: 1.1500 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-A-8625 TY 3 CL 1 MIL SPEC SINGLE TREATMENT RESPONSE; Distance From End to First Step: 0.3900 INCHES NOMINAL IN. 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.