The Spider,differential, cataloged under National Stock Number 2520-01-121-7703, is classified within Federal Supply Class 2520 (Vehicular Power Transmission Components) of the Vehicular Equipment Components group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2520-01-121-7703 |
| Item Name | Spider,differential |
| FSC / FSG | 2520 / 25 — Vehicular Power Transmission Components |
| Status | ACTIVE |
| Hub Outside Diameter | 2.842 INCHES NOMINAL IN |
| Hub Bore Diameter | 1.950 INCHES NOMINAL IN |
| Arm Length | 3.125 INCHES NOMINAL IN |
| Length Across Arms | 6.250 INCHES NOMINAL IN |
| Material | STEEL |
| Arm Diameter | 0.937 INCHES NOMINAL IN |
| Hub Thickness | 0.800 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 705-00013 | 3/9 Design control — primary reference U.S. Government activity |
NSN 2520-01-121-7703 is a Spider,differential, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.
Key specifications for 2520-01-121-7703: Hub Outside Diameter: 2.842 INCHES NOMINAL IN; Hub Bore Diameter: 1.950 INCHES NOMINAL IN; Arm Length: 3.125 INCHES NOMINAL IN; Length Across Arms: 6.250 INCHES NOMINAL IN. 7 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.