PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2201209Tensioner Pulley Assembly

Caterpillar Inc Div Caterpillar Defense · NSN 3950-01-506-8878 · FSC 3950 · No Item Name Available
Verified by PartsTable
NSN 3950-01-506-8878 — this item is cataloged by the U.S. Government under National Stock Number 3950-01-506-8878. Primary manufacturer part number: 2201209.
Features
  • Tensioner Pulley Assembly — FSC 3950
  • 4 verified cross-references
  • Primary manufacturer: Caterpillar Inc Div Caterpillar Defense
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Tensioner Pulley Assembly, cataloged under National Stock Number 3950-01-506-8878, is classified within Federal Supply Class 3950 (No Item Name Available) of the Materials Handling Equipment group. The primary manufacturer of record is Caterpillar Inc Div Caterpillar Defense. This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameTensioner Pulley Assembly
FSC / FSG3950 — No Item Name Available (FSG 39)
ManufacturersCaterpillar Inc Div Caterpillar Defense (CAGE 11083); General Dynamics Land Systems - Force Protection Inc. Dba Gdls Div Gdls-Fp (CAGE 1EFH8); Dayco Products Llc (CAGE 11288)
Technical Specifications
ParameterValue
NSN3950-01-506-8878
Primary Part Number2201209
Item NameTensioner Pulley Assembly
FSC / FSG3950 / 39 — No Item Name Available
ManufacturerCaterpillar Inc Div Caterpillar Defense
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5950-00-764-39340995762 INTERCHANGEABLE
Transformer,pulse
P C a Electronics Inc
5950-00-812-9662 INTERCHANGEABLE
Transformer,power
6160-01-314-177710 018 20 INTERCHANGEABLE
Battery Box
Sse Inc
4930-01-613-16021001820 INTERCHANGEABLE
Reel Assembly,static Discharge
Tld Ace Corp Div Tld Ace
Cross-Reference Index
Part NumberManufacturer
1979663 Caterpillar Inc Div Caterpillar Defense (USA)
1001820 General Dynamics Land Systems - Force Protection Inc. Dba Gdls Div Gdls-Fp (USA)
2201209 PRIMARY Caterpillar Inc Div Caterpillar Defense (USA)
2444-01 Dayco Products Llc (USA)
Related Parts
5950-00-764-3934INTERCHANGEABLE
TRANSFORMER,PULSE
0995762
5950-00-812-9662INTERCHANGEABLE
TRANSFORMER,POWER
6160-01-314-1777INTERCHANGEABLE
BATTERY BOX
10 018 20
4930-01-613-1602INTERCHANGEABLE
REEL ASSEMBLY,STATIC DISCHARGE
1001820

Frequently Asked Questions

What is NSN 3950-01-506-8878?

NSN 3950-01-506-8878 is a Tensioner Pulley Assembly, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 3950 (No Item Name Available). Status: active.

What are the part numbers for NSN 3950-01-506-8878?

NSN 3950-01-506-8878 has 4 cross-referenced part numbers: 1979663 (Caterpillar Inc Div Caterpillar Defense), 1001820 (General Dynamics Land Systems - Force Protection Inc. Dba Gdls Div Gdls-Fp), 2201209 (Caterpillar Inc Div Caterpillar Defense), 2444-01 (Dayco Products Llc).

What NSN replaces 3950-01-506-8878?

There are 4 known substitutes for 3950-01-506-8878: 5950-00-764-3934, 5950-00-812-9662, 6160-01-314-1777 and 1 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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