PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3-1261BCooler,fluid,transmission

Rocore Thermal Systems · NSN 2520-01-361-8237 · FSC 2520 · No Item Name Available
Verified by PartsTable
NSN 2520-01-361-8237 — this item is cataloged by the U.S. Government under National Stock Number 2520-01-361-8237. Primary manufacturer part number: 3-1261B.
Features
  • Cooler,fluid,transmission — FSC 2520
  • Tube Attachment Method: BRAZED BOTH ENDS
  • Length: 492.3 MILLIMETERS NOMINAL MM
  • Style Designator: COILED PLAIN TYPE
  • Material: STEEL TUBES
  • Material: STEEL HOUSING
  • Diameter: 127.0 MILLIMETERS NOMINAL MM
  • Heat Transfer Method: INDIRECT
Applications
  • Applications requiring Steel Tubes construction
General Description

The Cooler,fluid,transmission, cataloged under National Stock Number 2520-01-361-8237, is classified within Federal Supply Class 2520 (No Item Name Available) of the Vehicular Equipment Components group. The primary manufacturer of record is Rocore Thermal Systems. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 7 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
NSN2520-01-361-8237
Primary Part Number3-1261B
Item NameCooler,fluid,transmission
FSC / FSG2520 / 25 — No Item Name Available
ManufacturerRocore Thermal Systems
StatusACTIVE
Tube Attachment MethodBRAZED BOTH ENDS
Length492.3 MILLIMETERS NOMINAL MM
Style DesignatorCOILED PLAIN TYPE
MaterialSTEEL TUBES
MaterialSTEEL HOUSING
Diameter127.0 MILLIMETERS NOMINAL MM
Heat Transfer MethodINDIRECT
Height158.8 MILLIMETERS NOMINAL MM
Oil Flow Rate45.4 POUNDS PER MINUTE LBS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
2590-00-236-951244055 INTERCHANGEABLE
Cap,filler Opening
Center - Moeller Products Llc
5342-00-482-15781090143 INTERCHANGEABLE
Latch,safety
The Crosby Group Llc Dba the Crosby Group
4820-00-557-7333 INTERCHANGEABLE
Valve,check
5960-00-688-7510Y2211 INTERCHANGEABLE
Electron Tube
Mpd Components, Inc.
2805-00-756-8813L100NF INTERCHANGEABLE
Piston,internal Combustion Engin
Trw Inc Trw Steering and Suspension Div
6210-00-782-1742 INTERCHANGEABLE
Lens,light
5330-00-807-2264040157 INTERCHANGEABLE
Gasket
Parker-Hannifin Corporation Dba Pneutronics Div Composite Sealing Systems Division
5340-00-996-04054055 INTERCHANGEABLE
Shield,expansion
Star Expansion Co
3439-01-021-574780-5-5 INTERCHANGEABLE
Desoldering Wick
Illinois Tool Works Inc. Div Itw Chemtronics
6640-01-101-2989 INTERCHANGEABLE
Pipet,serological
Cross-Reference Index
Part NumberManufacturer
12414334-001 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
3-1261A Meggitt Troy Inc (USA)
2520013618237 E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales
12414334 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
12414334-001 Bae Systems Tactical Vehicle Systems Lp Dba Data Systems International Inc (USA)
12414334-001 Amz Alabama Inc. (USA)
3-1261B PRIMARY Rocore Thermal Systems (USA)
12414334 Bae Systems Tactical Vehicle Systems Lp Dba Data Systems International Inc (USA)
4055 Champ Products Inc (USA)
Related Parts
2590-00-236-9512INTERCHANGEABLE
CAP,FILLER OPENING
44055
5342-00-482-1578INTERCHANGEABLE
LATCH,SAFETY
1090143
4820-00-557-7333INTERCHANGEABLE
VALVE,CHECK
5960-00-688-7510INTERCHANGEABLE
ELECTRON TUBE
Y2211
2805-00-756-8813INTERCHANGEABLE
PISTON,INTERNAL COMBUSTION ENGIN
L100NF
6210-00-782-1742INTERCHANGEABLE
LENS,LIGHT
5330-00-807-2264INTERCHANGEABLE
GASKET
040157
5340-00-996-0405INTERCHANGEABLE
SHIELD,EXPANSION
4055
3439-01-021-5747INTERCHANGEABLE
DESOLDERING WICK
80-5-5
6640-01-101-2989INTERCHANGEABLE
PIPET,SEROLOGICAL
3510-01-195-2111INTERCHANGEABLE
CLAMP,DRIVE ROLL
4014-703
6515-01-362-0632INTERCHANGEABLE
LIGHT BULB,LARYNGOSCOPE

Frequently Asked Questions

What is NSN 2520-01-361-8237?

NSN 2520-01-361-8237 is a Cooler,fluid,transmission, manufactured by Rocore Thermal Systems, classified under FSC 2520 (No Item Name Available). Status: active.

What are the part numbers for NSN 2520-01-361-8237?

NSN 2520-01-361-8237 has 9 cross-referenced part numbers: 12414334-001 (U S Army Tank Automotive Command Amsta-Im-Mm), 3-1261A (Meggitt Troy Inc), 2520013618237 (E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales), 12414334 (U S Army Tank Automotive Command Amsta-Im-Mm), 12414334-001 (Bae Systems Tactical Vehicle Systems Lp Dba Data Systems International Inc) and 4 more.

What NSN replaces 2520-01-361-8237?

There are 12 known substitutes for 2520-01-361-8237: 2590-00-236-9512, 5342-00-482-1578, 4820-00-557-7333 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3-1261B?

Key specifications for 3-1261B: Special Features: TUBE COOLANT P/N12414381,50.8 X 1.65 WALL,BRAZED ONTO COOLER AT ONE END AND TUBE COOLANT P/N12414333,50.8 X 1.65 WALL,BRAZED ON TO OTHER END; BOTH TUBES ARE PREBENT; Tube Attachment Method: BRAZED BOTH ENDS; Length: 492.3 MILLIMETERS NOMINAL MM; Style Designator: COILED PLAIN TYPE. 11 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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