The Retainer,helical Compression Spr, cataloged under National Stock Number 5340-00-421-4532, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-421-4532 |
| Primary Part Number | 1128HM40081-13 |
| Item Name | Retainer,helical Compression Spr |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Flange Diameter | 2.682 INCHES MINIMUM AND 2.692 INCHES MAXIMUM IN |
| Body Outside Diameter | 2.057 INCHES MINIMUM AND 2.067 INCHES MAXIMUM IN |
| Style Designator | PARALLEL |
| Casehardening Indicator | NOT CASEHARDENED |
| Material | ALUMINUM ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 1128HM40081-13 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 1128HM40081-13 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| 1128HM40081 | D/9 Drawing number reference only Northrop Grumman Systems Corporation |
NSN 5340-00-421-4532 is a Retainer,helical Compression Spr, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-421-4532 has 1 manufacturer part number on file: 1128HM40081-13 (Northrop Grumman Systems Corporation).
Key specifications for 1128HM40081-13: Flange Diameter: 2.682 INCHES MINIMUM AND 2.692 INCHES MAXIMUM IN; Overall Height: 3.672 INCHES MINIMUM AND 3.702 INCHES MAXIMUM IN; Body Outside Diameter: 2.057 INCHES MINIMUM AND 2.067 INCHES MAXIMUM IN; Style Designator: PARALLEL. 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.
NSN 5340-00-421-4532 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.