The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-215-0640, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Mid-America Aerotech, Llc. Government technical data includes 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-215-0640 |
| Primary Part Number | 8564 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Mid-America Aerotech, Llc |
| Status | ACTIVE |
| FSC Application Data | AIRCRAFT WHEEL,BRAKE SYSTEMS |
| Material Hardness Rating | 25.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| Design Type | SOLID |
| Material Document and Classification | QQ-S-764, TYPE 440F-CANCELED FED SPEC SINGLE MATERIAL RESPONSE |
| Surface Treatment | PASSIVATE |
| Material | STEEL COMP 440F |
| 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 |
|---|---|
| 8564 | Mid-America Aerotech, Llc (USA) |
| Reference | Meaning |
|---|---|
| 8564 | 3/9 Design control — primary reference E-Systems Inc Montek Div Fluid Controls Opns |
| 8564 | 5/9 Secondary reference U.S. Government activity |
NSN 5340-00-215-0640 is a Seat,helical Compression Spring, manufactured by Mid-America Aerotech, Llc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-215-0640 has 1 manufacturer part number on file: 8564 (Mid-America Aerotech, Llc).
4 possible matches (shared part number, not a government interchangeability claim): 5330-00-260-0121, 3020-00-287-8285, 5950-01-007-5744. Verify interchangeability with system specifications before substitution.
Key specifications for 8564: FSC Application Data: AIRCRAFT WHEEL,BRAKE SYSTEMS; Material Hardness Rating: 25.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM; Design Type: SOLID; Material Document and Classification: QQ-S-764, TYPE 440F-CANCELED FED SPEC SINGLE MATERIAL RESPONSE. 6 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.