The Spring,helical,extension, cataloged under National Stock Number 5360-01-421-4103, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5360-01-421-4103 |
| Primary Part Number | 2-73336-3 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Spring Free Outside Diameter | 0.780 INCHES MINIMUM AND 0.802 INCHES MAXIMUM IN |
| End Style | RAISED HOOK BOTH ENDS |
| Design Type | HELPER SPRING |
| Style Designator | CYLINDRICAL |
| Opening Width | 0.300 INCHES NOMINAL BOTH ENDS IN |
| Material Document and Classification | AMS 5678 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Spring Free Length | 5.650 INCHES NOMINAL IN |
| Spring Deflection Rate | 0.158 POUNDS PER INCH NOMINAL LBS |
| Coil to Hook Inside Length | 0.800 INCHES NOMINAL BOTH ENDS IN |
| Inside Diameter | 0.714 INCHES MINIMUM AND 0.740 INCHES MAXIMUM IN |
| Coil Quantity | 23 |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL COMP 631 OVERALL |
| Hook Radius | 0.300 INCHES NOMINAL BOTH ENDS IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 2-73336-3 | Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company (USA) |
| 2-73336-3 | Alamo Aircraft, Ltd. (USA) |
| 2-73336-3 | Argo Spring Manufacturing Co., Inc. Dba Argo Spring Manufacturing Co Inc (USA) |
| 2-73336-3 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 2-73336-3 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| 2-73336-3 | 5/9 Secondary reference The Precision Coil Spring Company Dba Precision Coil Spring Co |
| 2-73336-3 | 5/9 Secondary reference Northrop Grumman Technical Services, Inc. Dba Defense Systems Sector |
NSN 5360-01-421-4103 is a Spring,helical,extension, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-01-421-4103 has 4 manufacturer part numbers on file: 2-73336-3 (Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company), 2-73336-3 (Alamo Aircraft, Ltd.), 2-73336-3 (Argo Spring Manufacturing Co., Inc. Dba Argo Spring Manufacturing Co Inc), 2-73336-3 (Northrop Grumman Systems Corporation).
Key specifications for 2-73336-3: Spring Free Outside Diameter: 0.780 INCHES MINIMUM AND 0.802 INCHES MAXIMUM IN; End Style: RAISED HOOK BOTH ENDS; Design Type: HELPER SPRING; Style Designator: CYLINDRICAL. 14 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5360-01-421-4103 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.