PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1K3166Disk,clutch,vehicular

Caterpillar Inc Div Caterpillar Defense · NSN 2520-00-778-0555 · FSC 2520 · No Item Name Available
Verified by PartsTable
NSN 2520-00-778-0555 — this item is cataloged by the U.S. Government under National Stock Number 2520-00-778-0555. Primary manufacturer part number: 1K3166.
Features
  • Disk,clutch,vehicular — FSC 2520
  • Disk Material: STEEL
  • Outside Diameter: 11.375 INCHES NOMINAL IN
  • Spline Quantity: 24
  • Spline Type: INVOLUTE
  • Design Type: DRY
  • Disk Type: PLAIN
  • Flexibility: RIGID
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Disk,clutch,vehicular, cataloged under National Stock Number 2520-00-778-0555, is classified within Federal Supply Class 2520 (No Item Name Available) of the Vehicular Equipment Components group. The primary manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 16 commercial cross-references from 8 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2520-00-778-0555
Primary Part Number1K3166
Item NameDisk,clutch,vehicular
FSC / FSG2520 / 25 — No Item Name Available
ManufacturerCaterpillar Inc Div Caterpillar Defense
StatusACTIVE
Disk MaterialSTEEL
Outside Diameter11.375 INCHES NOMINAL IN
Spline Quantity24
Spline TypeINVOLUTE
Design TypeDRY
Disk TypePLAIN
FlexibilityRIGID
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4820-00-036-284611524 INTERCHANGEABLE
Valve,ball
Clayton Manufacturing Company
6145-00-164-02608489 INTERCHANGEABLE
Cable,power,electrical
Belden Wire & Cable Company Llc Dba Belden Cdt Electronics Division
5133-00-232-8161 INTERCHANGEABLE
Drill,twist
5330-00-261-4436 INTERCHANGEABLE
Seal,plain Encased
5310-00-262-61881229J530 INTERCHANGEABLE
Washer,key
Meritor Industrial Products, Llc
5815-00-392-7884SM-B-148553 INTERCHANGEABLE
Teletypewriter Subassembly
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5945-00-578-40107912-546906 INTERCHANGEABLE
Solenoid,electrical
Parker Hannifin Corporation Div Aerospace Group Headquarters
2910-00-608-85725273 INTERCHANGEABLE
Strainer,fuel Tank
Stewart & Stevenson Power Products Llc
5910-00-716-61051152-4 INTERCHANGEABLE
Capacitor,fixed,electrolytic
Sprague Electric Co World Hqs
2520-00-734-96985-124X INTERCHANGEABLE
Parts Kit,universal Joint
Dana Corp Spicer Transmission Div
Cross-Reference Index
Part NumberManufacturer
75125 Komatsu America Corporation (USA)
1K3166 PRIMARY Caterpillar Inc Div Caterpillar Defense (USA)
41529-5273 Komatsu America Corporation (USA)
D75125 Komatsu America Corporation (USA)
75125 PRIMARY Dressta North America Ltd (USA)
5273 Scott Huber Essick a Co of Figgie International Inc (USA)
RB41529-5273 Komatsu America Corporation (USA)
R18474-5273 Komatsu America Corporation (USA)
5273 PRIMARY Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (USA)
0P697 Blaw-Knox Construction Equipment Co Div of White Consolidated Industries Inc (USA)
1-1524 Benju Sales & Earths Choice Inc Dba Benju Div Benju Sales (USA)
184745273 Komatsu America Corporation (USA)
R29179-5273 Komatsu America Corporation (USA)
5273 Arrow-Master, Incorporated (USA)
291795273 Komatsu America Corporation (USA)
5273 Blaw-Knox Construction Equipment Co Div of White Consolidated Industries Inc (USA)
Related Parts
4820-00-036-2846INTERCHANGEABLE
VALVE,BALL
11524
6145-00-164-0260INTERCHANGEABLE
CABLE,POWER,ELECTRICAL
8489
5133-00-232-8161INTERCHANGEABLE
DRILL,TWIST
5330-00-261-4436INTERCHANGEABLE
SEAL,PLAIN ENCASED
5310-00-262-6188INTERCHANGEABLE
WASHER,KEY
1229J530
5815-00-392-7884INTERCHANGEABLE
TELETYPEWRITER SUBASSEMBLY
SM-B-148553
5945-00-578-4010INTERCHANGEABLE
SOLENOID,ELECTRICAL
7912-546906
2910-00-608-8572INTERCHANGEABLE
STRAINER,FUEL TANK
5273
5910-00-716-6105INTERCHANGEABLE
CAPACITOR,FIXED,ELECTROLYTIC
1152-4
2520-00-734-9698INTERCHANGEABLE
PARTS KIT,UNIVERSAL JOINT
5-124X
2540-00-737-2363INTERCHANGEABLE
MIRROR REAR VIEW
7372363
1650-00-857-4465INTERCHANGEABLE
FILTER ELEMENT,FLUID
AC20-4234E1

Frequently Asked Questions

What is NSN 2520-00-778-0555?

NSN 2520-00-778-0555 is a Disk,clutch,vehicular, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2520 (No Item Name Available). Status: active.

What are the part numbers for NSN 2520-00-778-0555?

NSN 2520-00-778-0555 has 16 cross-referenced part numbers: 75125 (Komatsu America Corporation), 1K3166 (Caterpillar Inc Div Caterpillar Defense), 41529-5273 (Komatsu America Corporation), D75125 (Komatsu America Corporation), 75125 (Dressta North America Ltd) and 11 more.

What NSN replaces 2520-00-778-0555?

There are 12 known substitutes for 2520-00-778-0555: 4820-00-036-2846, 6145-00-164-0260, 5133-00-232-8161 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1K3166?

Key specifications for 1K3166: Disk Material: STEEL; Outside Diameter: 11.375 INCHES NOMINAL IN; Spline Quantity: 24; Spline Type: INVOLUTE. 8 total characteristics are documented in the Federal Logistics Information System.

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