The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-346-3262, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Siemens Energy, Inc.. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-346-3262 |
| Primary Part Number | HC260X2 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Siemens Energy, Inc. |
| Status | ACTIVE |
| First Step Diameter | 1.6200 INCHES MINIMUM AND 1.6250 INCHES MAXIMUM IN |
| End Diameter | 1.3750 INCHES NOMINAL IN |
| Distance From End to First Step | 2.2500 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Second Step Diameter | 2.1850 INCHES MINIMUM AND 2.1860 INCHES MAXIMUM IN |
| First Step Length | 0.1880 INCHES NOMINAL IN |
| Bore Diameter | 0.8750 INCHES MINIMUM AND 0.8780 INCHES MAXIMUM 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 |
|---|---|
| G17188PC35 | Siemens Energy, Inc. (USA) |
| DD5610BPC5 | Siemens Energy, Inc. (USA) |
| G10147PC29 | Siemens Energy, Inc. (USA) |
| H1871PC35 | Siemens Energy, Inc. (USA) |
| HC260X2 PRIMARY | Siemens Energy, Inc. (USA) |
| Reference | Meaning |
|---|---|
| HC-260X2 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| AV7S55-214PC29 | 5/2 Secondary reference U.S. Government activity |
NSN 5340-00-346-3262 is a Seat,helical Compression Spring, manufactured by Siemens Energy, Inc., classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-346-3262 has 5 manufacturer part numbers on file: G17188PC35 (Siemens Energy, Inc.), DD5610BPC5 (Siemens Energy, Inc.), G10147PC29 (Siemens Energy, Inc.), H1871PC35 (Siemens Energy, Inc.), HC260X2 (Siemens Energy, Inc.).
Key specifications for HC260X2: Overall Height: 2.6130 INCHES NOMINAL IN; First Step Diameter: 1.6200 INCHES MINIMUM AND 1.6250 INCHES MAXIMUM IN; End Diameter: 1.3750 INCHES NOMINAL IN; Distance From End to First Step: 2.2500 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.