The Retainer,helical Compression Spr, cataloged under National Stock Number 5340-01-182-4271, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corp Div Weapon System. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Item Name | Retainer,helical Compression Spr |
| FSC / FSG | 5340 — Hardware, Commercial (FSG 53) |
| Manufacturers | Northrop Grumman Systems Corp Div Weapon System (CAGE 8KP69); The Boeing Company (CAGE 8V613) |
| Parameter | Value |
|---|---|
| NSN | 5340-01-182-4271 |
| Primary Part Number | 387-3942 |
| Item Name | Retainer,helical Compression Spr |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Northrop Grumman Systems Corp Div Weapon System |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 387-3942 PRIMARY | Northrop Grumman Systems Corp Div Weapon System (USA) |
| 387-3942 | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| 387-3942 | 5/9 Secondary reference Mcdonnell Douglas Helicopter Co Inc |
| 387-3942 | 5/9 Secondary reference Tempco Engineering Inc Dba Lmi Aerospace |
| 387-3942 | 3/9 Design control — primary reference Alliant Techsystems Operations Llc |
NSN 5340-01-182-4271 is a Retainer,helical Compression Spr, manufactured by Northrop Grumman Systems Corp Div Weapon System, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-182-4271 has 2 manufacturer part numbers on file: 387-3942 (Northrop Grumman Systems Corp Div Weapon System), 387-3942 (The Boeing Company).
1 possible match (shared part number, not a government interchangeability claim): 6220-01-592-1479. Verify interchangeability with system specifications before substitution.
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 5340-01-182-4271 has DEMIL Code Q. 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.