The Retainer,helical Compression Spr, cataloged under National Stock Number 5340-00-182-5168, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-00-182-5168 |
| Primary Part Number | 1128LM40405-11 |
| Item Name | Retainer,helical Compression Spr |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| FSC Application Data | SPRING ASSEMBLY,NOSE GEAR LAUNCH,AIRCRAFT |
| Material Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM |
| Surface Treatment Document and Classification | QQ-P-416, TYPE 2 FED SPEC SINGLE TREATMENT RESPONSE |
| Casehardening Indicator | NOT CASEHARDENED |
| Surface Treatment | CADMIUM AND CHROMATE |
| Material | STEEL |
| 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 |
|---|---|
| 1128LM40405-11 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 1128LM40405-11 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 5340-00-182-5168 is a Retainer,helical Compression Spr, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-182-5168 has 1 manufacturer part number on file: 1128LM40405-11 (Northrop Grumman Systems Corporation).
Key specifications for 1128LM40405-11: FSC Application Data: SPRING ASSEMBLY,NOSE GEAR LAUNCH,AIRCRAFT; Material Hardness Rating: 39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM; Surface Treatment Document and Classification: QQ-P-416, TYPE 2 FED SPEC SINGLE TREATMENT RESPONSE; Casehardening Indicator: NOT CASEHARDENED. 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.