The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-240-5729, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Magnatrol Valve Corp Div Clark-Cooper. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-240-5729 |
| Primary Part Number | SH12-3N PIECE 64 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Magnatrol Valve Corp Div Clark-Cooper |
| Status | ACTIVE |
| Design Type | SOLID |
| Material Document and Classification | ASTM A582, CL 303, COND B ASSN STD SINGLE MATERIAL RESPONSE |
| Material | STEEL COMP 303 |
| 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 |
|---|---|
| SH12-3N PIECE 64 PRIMARY | Magnatrol Valve Corp Div Clark-Cooper (USA) |
| Reference | Meaning |
|---|---|
| 3306285 PIECE 64 | 5/2 Secondary reference U.S. Government activity |
NSN 5340-01-240-5729 is a Seat,helical Compression Spring, manufactured by Magnatrol Valve Corp Div Clark-Cooper, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-240-5729 has 1 manufacturer part number on file: SH12-3N PIECE 64 (Magnatrol Valve Corp Div Clark-Cooper).
Key specifications for SH12-3N PIECE 64: Design Type: SOLID; Material Document and Classification: ASTM A582, CL 303, COND B ASSN STD SINGLE MATERIAL RESPONSE; Material: STEEL COMP 303. 3 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.