The Lock,shaft,transmission, cataloged under National Stock Number 2520-00-423-9491, is classified within Federal Supply Class 2520 (Vehicular Power Transmission Components) of the Vehicular Equipment Components group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 1 specification, 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 | 2520-00-423-9491 |
| Primary Part Number | 4F2039 |
| Item Name | Lock,shaft,transmission |
| FSC / FSG | 2520 / 25 — Vehicular Power Transmission Components |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,2.719 IN. OD,ID ROUNDED ON SIDES AND STRAIGHT ON ENDS,2.812 IN. ID LG,2.812 IN. ID W,0.062 IN. MATL THK,FOUR 0.250 IN. W TABS ON ID WITH TIPS BENT AT 90 DEG ANGLE IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4F2039 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 2520-00-423-9491 is a Lock,shaft,transmission, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.
NSN 2520-00-423-9491 has 1 manufacturer part number on file: 4F2039 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 4F2039: General Characteristics Item Description: STEEL,2.719 IN. OD,ID ROUNDED ON SIDES AND STRAIGHT ON ENDS,2.812 IN. ID LG,2.812 IN. ID W,0.062 IN. MATL THK,FOUR 0.250 IN. W TABS ON ID WITH TIPS BENT AT 90 DEG ANGLE IN. 1 specification is 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.