The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-874-4676, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Hamilton Sundstrand Corporation Dba Collins Aerospace. Government technical data includes 5 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. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5340-00-874-4676 |
| Primary Part Number | 538261 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| Material Hardness Rating | 65.0 ROCKWELL B NOMINAL |
| Surface Treatment Document and Classification | MIL-A-8625, TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE |
| Material Document and Classification | QQ-A-225/6, ALLOY 2024 FED SPEC SINGLE MATERIAL RESPONSE |
| Surface Treatment | ANODIZE |
| Material | ALUMINUM ALLOY 2024 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 538261 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
NSN 5340-00-874-4676 is a Seat,helical Compression Spring, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-874-4676 has 1 manufacturer part number on file: 538261 (Hamilton Sundstrand Corporation Dba Collins Aerospace).
2 possible matches (shared part number, not a government interchangeability claim): 7025-01-499-5571, 4820-01-665-8569. Verify interchangeability with system specifications before substitution.
Key specifications for 538261: Material Hardness Rating: 65.0 ROCKWELL B NOMINAL; Surface Treatment Document and Classification: MIL-A-8625, TYPE 1 MIL SPEC SINGLE TREATMENT RESPONSE; Material Document and Classification: QQ-A-225/6, ALLOY 2024 FED SPEC SINGLE MATERIAL RESPONSE; Special Features: OV-1 SERIES ACFT. 5 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.