PartsTable TECHNICAL DATA SHEET

NSN 3020-01-563-3311Government record, cited

Gear Cluster3020-01-563-3311

NSN 3020-01-563-3311 · NIIN 015633311 · Part number 187-8979

Caterpillar Inc Div Caterpillar Defense · FSC 3020 — Gears, Pulleys, Sprockets, and Transmission Chain · FSG 30 — Mechanical Power Transmission Equipment · CAGE 11083

Government record, cited

NSN 3020-01-563-3311 — this item is cataloged by the U.S. Government under National Stock Number 3020-01-563-3311. Manufacturer of record part number: 187-8979.

Also searched as 3020-01-563-3311 · 3020015633311 · NIIN 015633311 · 01-563-3311 · FSC 3020 Gears, Pulleys, Sprockets, and Transmission Chain · CAGE 11083 · 187-8979 · 14KP157 · 14KP157 · 1878979 · 149-9107

Nearby stock numbers ← 3020-01-563-3299 Gear, Spur · 3020-01-563-3820 Sprocket Wheel Segment, Drive Uni →

Features

Gear Cluster — FSC 3020
2 manufacturer part numbers on file
Manufacturer of record: Caterpillar Inc Div Caterpillar Defense

Identification

NSN: 3020-01-563-3311
NIIN: 015633311
FSC: 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
FSG: 30 — Mechanical Power Transmission Equipment
Primary part number: 187-8979
Manufacturer: Caterpillar Inc Div Caterpillar Defense

General Description

The Gear Cluster, cataloged under National Stock Number 3020-01-563-3311, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	3020-01-563-3311
Primary Part Number	187-8979
Item Name	Gear Cluster
FSC / FSG	3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain
Manufacturer	Caterpillar Inc Div Caterpillar Defense
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
187-8979 PRIMARY	Caterpillar Inc Div Caterpillar Defense (USA)
14KP157	Oshkosh Defense Llc (USA)

Reference documents

Reference	Meaning
14KP157	5/9 Secondary reference Oshkosh Corp
1878979	5/9 Secondary reference Caterpillar Inc Div Caterpillar Defense
149-9107	5/9 Secondary reference Caterpillar Inc Div Caterpillar Defense

No interchangeability data on file.

Other items in FSC 3020 — Gears, Pulleys, Sprockets, and Transmission Chain

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

3020-00-000-0091

GEAR,SPUR

3020-00-001-0027

3020-00-001-0027 · Item name not on file

3020-00-001-0028

3020-00-001-0028 · Item name not on file

3020-00-001-0063

3020-00-001-0063 · Item name not on file

3020-00-001-0064

3020-00-001-0064 · Item name not on file

3020-00-001-0066

3020-00-001-0066 · Item name not on file

3020-00-001-0071

3020-00-001-0071 · Item name not on file

3020-00-001-0072

3020-00-001-0072 · Item name not on file

Frequently Asked Questions

What is NSN 3020-01-563-3311?

NSN 3020-01-563-3311 is a Gear Cluster, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.

What part numbers are listed for NSN 3020-01-563-3311?

NSN 3020-01-563-3311 has 2 manufacturer part numbers on file: 187-8979 (Caterpillar Inc Div Caterpillar Defense), 14KP157 (Oshkosh Defense Llc).

What are the specifications of 187-8979?

Key specifications for 187-8979: Part Name Assigned by Controlling Agency: GEAR ASSEMBLY CLUSTER (105/63 TEETH); End Item Identification: 2320-01-534-1103 TRUCK, TANK. 0 specifications are documented in the U.S. Government catalog.

Is NSN 3020-01-563-3311 hazardous material?

No hazard code in the DLA record (HMIC N). 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.

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