The Spring,helical,extension, cataloged under National Stock Number 5360-00-320-4977, 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 15 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.
| Parameter | Value |
|---|---|
| NSN | 5360-00-320-4977 |
| Primary Part Number | G102-139 |
| 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 | 0.312 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-W-345 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Load Rating | 3.88 POUNDS NOMINAL LBS |
| End Style | SHORT TWISTED HOOK BOTH ENDS |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Material Document and Classification | AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Spring Free Length | 1.002 INCHES NOMINAL IN |
| Spring Deflection Rate | 4.600 POUNDS PER INCH NOMINAL LBS |
| Inside Diameter | 0.248 INCHES NOMINAL IN |
| Spring Length Under Load | 1.781 INCHES NOMINAL IN |
| Surface Treatment | COPPER OVERALL |
| Coil Helix Direction | RIGHT-HAND OR LEFT-HAND |
| Material | STEEL COMP 304 OVERALL |
| Hook Radius | 0.125 INCHES NOMINAL BOTH ENDS IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| G102-139 PRIMARY | Northrop Grumman Systems Corporation (USA) |
NSN 5360-00-320-4977 is a Spring,helical,extension, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-320-4977 has 1 manufacturer part number on file: G102-139 (Northrop Grumman Systems Corporation).
Key specifications for G102-139: Spring Free Outside Diameter: 0.312 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-W-345 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Load Rating: 3.88 POUNDS NOMINAL LBS; End Style: SHORT TWISTED HOOK BOTH ENDS. 15 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.
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.