The Bumper, cataloged under National Stock Number 5340-01-547-8040, 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 7 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. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-547-8040 |
| Primary Part Number | MC21598 |
| Item Name | Bumper |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace |
| Status | ACTIVE |
| Shank Diameter | 0.265 INCHES MINIMUM AND 0.275 INCHES MAXIMUM IN |
| Outside/top Flange Diameter | 0.405 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN |
| Shank Length | 0.705 INCHES MINIMUM AND 0.708 INCHES MAXIMUM IN |
| Criticality Code Justification | AGAV |
| Style Designator | FLANGED |
| Material Document and Classification | QQ-A-225/6 ASSN STD ALL MATERIAL RESPONSES |
| Material | ALUMINUM ALLOY 2024 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | Y |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| MC21598 PRIMARY | Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace (USA) |
NSN 5340-01-547-8040 is a Bumper, manufactured by Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-547-8040 has 1 manufacturer part number on file: MC21598 (Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace).
Key specifications for MC21598: Shank Diameter: 0.265 INCHES MINIMUM AND 0.275 INCHES MAXIMUM IN; Overall Height: 0.885 INCHES MINIMUM AND 0.888 INCHES MAXIMUM IN; Outside/top Flange Diameter: 0.405 INCHES MINIMUM AND 0.415 INCHES MAXIMUM IN; Shank Length: 0.705 INCHES MINIMUM AND 0.708 INCHES MAXIMUM IN. 7 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.
NSN 5340-01-547-8040 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.