The Spring,helical,extension, cataloged under National Stock Number 5360-00-321-7498, is classified within Federal Supply Class 5360 (Coil, Flat, Leaf, and Wire Springs) of the Hardware and Abrasives group. The manufacturer of record is Hatch & Kirk, Inc.. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 5360-00-321-7498 |
| Primary Part Number | 3300020 |
| Item Name | Spring,helical,extension |
| FSC / FSG | 5360 / 53 — Coil, Flat, Leaf, and Wire Springs |
| Manufacturer | Hatch & Kirk, Inc. |
| Status | ACTIVE |
| Spring Free Outside Diameter | 1.094 INCHES NOMINAL IN |
| Load Rating | 4.270 POUNDS NOMINAL LBS |
| End Style | LONG ROUND HOOK SECOND END |
| End Style | MACHINE CUT-OFF FIRST END |
| Design Type | CLOSED |
| Style Designator | CYLINDRICAL |
| Opening Width | 0.188 INCHES NOMINAL SECOND END IN |
| Spring Free Length | 2.21875 INCHES NOMINAL IN |
| Spring Deflection Rate | 1.900 POUNDS PER INCH NOMINAL LBS |
| Coil to Hook Inside Length | 0.553 INCHES NOMINAL SECOND END IN |
| Inside Diameter | 0.94975 INCHES NOMINAL IN |
| Spring Length Under Load | 3.034 INCHES NOMINAL IN |
| Coil Quantity | 21 |
| Surface Treatment | CADMIUM OVERALL |
| Coil Helix Direction | RIGHT-HAND |
| Material | STEEL OVERALL |
| Hook Radius | 0.156 INCHES NOMINAL SECOND END 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 |
|---|---|
| 3300020 PRIMARY | Hatch & Kirk, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 3300020 | 5/9 Secondary reference General Motors Corp Electro-Motive Div |
NSN 5360-00-321-7498 is a Spring,helical,extension, manufactured by Hatch & Kirk, Inc., classified under FSC 5360, Coil, Flat, Leaf, and Wire Springs. Status: active.
NSN 5360-00-321-7498 has 1 manufacturer part number on file: 3300020 (Hatch & Kirk, Inc.).
Key specifications for 3300020: Spring Free Outside Diameter: 1.094 INCHES NOMINAL IN; Load Rating: 4.270 POUNDS NOMINAL LBS; End Style: LONG ROUND HOOK SECOND END; End Style: MACHINE CUT-OFF FIRST END. 17 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.