The Retainer,helical Compression Spr, cataloged under National Stock Number 5340-01-140-3701, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-140-3701 |
| Primary Part Number | MC14821 |
| Item Name | Retainer,helical Compression Spr |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace |
| Status | ACTIVE |
| Flange Diameter | 1.560 INCHES NOMINAL IN |
| FSC Application Data | AIRCRAFT WHEEL AND BRAKE SYSTEM |
| Surface Treatment Document and Classification | MIL-8625,TYPE 3,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE |
| Body Outside Diameter | 1.154 INCHES MINIMUM AND 1.156 INCHES MAXIMUM IN |
| Style Designator | IRREGULAR |
| Material Document and Classification | QQ-A-200/8, 6061, T6 FED SPEC 1ST MATERIAL RESPONSE AND QQ-A-225/8, ALLOY 6061, T6 FED SPEC 2ND MATERIAL RESPONSE |
| Body Inside Diameter | 0.484 INCHES MINIMUM AND 0.487 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Surface Treatment | ANODIZE |
| 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 |
| Part Number | Manufacturer |
|---|---|
| MC14821 PRIMARY | Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace (USA) |
| Reference | Meaning |
|---|---|
| 10112718 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5340-01-140-3701 is a Retainer,helical Compression Spr, manufactured by Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-140-3701 has 1 manufacturer part number on file: MC14821 (Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace).
Key specifications for MC14821: Flange Diameter: 1.560 INCHES NOMINAL IN; Overall Height: 1.440 INCHES MINIMUM AND 1.450 INCHES MAXIMUM IN; FSC Application Data: AIRCRAFT WHEEL AND BRAKE SYSTEM; Surface Treatment Document and Classification: MIL-8625,TYPE 3,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE. 10 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.