NSN 2520-01-520-9781 — this item is cataloged by the U.S. Government under National Stock Number 2520-01-520-9781. Manufacturer of record part number: 4D99522G01.
Also searched as2520-01-520-9781 ·
2520015209781 ·
NIIN 015209781 ·
01-520-9781 ·
FSC 2520 Vehicular Power Transmission Components · CAGE 04808 · 4D99522G01 · 4D99141 ITEM 4
Manufacturer of record: Curtiss-Wright Electro-Mechanical Corporation Div Curtiss-Wright Emd
Identification
NSN: 2520-01-520-9781
NIIN: 015209781
FSC: 2520 — Vehicular Power Transmission Components
FSG: 25 — Vehicular Equipment Components
Primary part number: 4D99522G01
Manufacturer: Curtiss-Wright Electro-Mechanical Corporation Div Curtiss-Wright Emd
General Description
The Differential Gear Unit, cataloged under National Stock Number 2520-01-520-9781, is classified within Federal Supply Class 2520 (Vehicular Power Transmission Components) of the Vehicular Equipment Components group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Div Curtiss-Wright Emd. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
2520-01-520-9781
Primary Part Number
4D99522G01
Item Name
Differential Gear Unit
FSC / FSG
2520 / 25 — Vehicular Power Transmission Components
Manufacturer
Curtiss-Wright Electro-Mechanical Corporation Div Curtiss-Wright Emd
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
Curtiss-Wright Electro-Mechanical Corporation Div Curtiss-Wright Emd (USA)
No interchangeability data on file.
Other items in FSC 2520 — Vehicular Power Transmission Components
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
2520-00-000-3976
2520-00-000-3976 · Item name not on file
2520-00-000-8852
2520-00-000-8852 · Item name not on file
2520-00-000-9292
2520-00-000-9292 · Item name not on file
2520-00-001-0011
2520-00-001-0011 · Item name not on file
2520-00-001-3397
2520-00-001-3397 · Item name not on file
2520-00-001-3425
2520-00-001-3425 · Item name not on file
2520-00-001-3440
ROLLER,CENTER
2520-00-001-3441
2520-00-001-3441 · Item name not on file
Frequently Asked Questions
What is NSN 2520-01-520-9781?
NSN 2520-01-520-9781 is a Differential Gear Unit, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Curtiss-Wright Emd, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.
What part numbers are listed for NSN 2520-01-520-9781?
NSN 2520-01-520-9781 has 2 manufacturer part numbers on file: 4D99141 ITEM 4 (Curtiss-Wright Electro-Mechanical Corporation Div Curtiss-Wright Emd), 4D99522G01 (Curtiss-Wright Electro-Mechanical Corporation Div Curtiss-Wright Emd).
What are the specifications of 4D99522G01?
Key specifications for 4D99522G01: Special Features: KNOWN AS JOURNAL ASSY, FRONT. 0 specifications are documented in the U.S. Government catalog.
Is NSN 2520-01-520-9781 hazardous material?
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.