PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MX2563C25Coupling Assembly,impulse

Fairbanks Morse, Llc · NSN 2920-00-374-4745 · FSC 2920 · No Item Name Available
Verified by PartsTable
NSN 2920-00-374-4745 — this item is cataloged by the U.S. Government under National Stock Number 2920-00-374-4745. Primary manufacturer part number: MX2563C25.
Features
  • Coupling Assembly,impulse — FSC 2920
  • General Characteristics Item Description: STEEL;0.562 IN. ID;2.000 IN. OD;1.375 IN. H IN
  • 7 verified cross-references
  • Primary manufacturer: Fairbanks Morse, Llc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Coupling Assembly,impulse, cataloged under National Stock Number 2920-00-374-4745, is classified within Federal Supply Class 2920 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Fairbanks Morse, Llc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN2920-00-374-4745
Primary Part NumberMX2563C25
Item NameCoupling Assembly,impulse
FSC / FSG2920 / 29 — No Item Name Available
ManufacturerFairbanks Morse, Llc
StatusCANCELLED
General Characteristics Item DescriptionSTEEL;0.562 IN. ID;2.000 IN. OD;1.375 IN. H IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
1620-00-024-63464445 INTERCHANGEABLE
Orifice,valve
Goodrich Corporation
5120-00-116-3088Y143 INTERCHANGEABLE
Die,crimping Tool
Daniels Manufacturing Corporation
5820-00-230-0454 INTERCHANGEABLE
Radio Set
5120-00-249-1071 INTERCHANGEABLE
Handle,socket Wrench
4820-00-274-7389 INTERCHANGEABLE
Valve,globe
6740-00-397-9626601122 INTERCHANGEABLE
Macro Extension
Polaroid Corporation Dba Polaroid
4730-00-522-1969 INTERCHANGEABLE
Packing Nut
4820-00-844-2426 INTERCHANGEABLE
Valve,globe
5999-00-846-298744-45 INTERCHANGEABLE
Delay Line
Esc Control Electronics Llc Dba Control Electronics Division of Fil-Coil
4820-00-892-2007 INTERCHANGEABLE
Valve,globe
Cross-Reference Index
Part NumberManufacturer
MX2563C25 PRIMARY Fairbanks Morse, Llc (USA)
4445 L & L Boiler Maintenance Inc (USA)
610522 Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA)
4445 D & J Parts Inc (USA)
MX2563C25 Coltec Industries Inc. Dba Fairbanks Morse Engine Div Fairbanks Morse Engine (USA)
610522 Aqua-Chem Inc Cleaver-Brooks Div (USA)
MX2563C Coltec Industries Inc. Dba Fairbanks Morse Engine Div Fairbanks Morse Engine (USA)
Related Parts
1620-00-024-6346INTERCHANGEABLE
ORIFICE,VALVE
4445
5120-00-116-3088INTERCHANGEABLE
DIE,CRIMPING TOOL
Y143
5820-00-230-0454INTERCHANGEABLE
RADIO SET
5120-00-249-1071INTERCHANGEABLE
HANDLE,SOCKET WRENCH
4820-00-274-7389INTERCHANGEABLE
VALVE,GLOBE
6740-00-397-9626INTERCHANGEABLE
MACRO EXTENSION
601122
4730-00-522-1969INTERCHANGEABLE
PACKING NUT
4820-00-844-2426INTERCHANGEABLE
VALVE,GLOBE
5999-00-846-2987INTERCHANGEABLE
DELAY LINE
44-45
4820-00-892-2007INTERCHANGEABLE
VALVE,GLOBE
5905-00-904-0290INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND,INDUCT
018-032-019
5985-01-103-0049INTERCHANGEABLE
ATTENUATOR,FIXED
40-012082-05

Frequently Asked Questions

What is NSN 2920-00-374-4745?

NSN 2920-00-374-4745 is a Coupling Assembly,impulse, manufactured by Fairbanks Morse, Llc, classified under FSC 2920 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 2920-00-374-4745?

NSN 2920-00-374-4745 has 7 cross-referenced part numbers: MX2563C25 (Fairbanks Morse, Llc), 4445 (L & L Boiler Maintenance Inc), 610522 (Aqua-Chem, Inc. Dba Aqua-Chem Inc), 4445 (D & J Parts Inc), MX2563C25 (Coltec Industries Inc. Dba Fairbanks Morse Engine Div Fairbanks Morse Engine) and 2 more.

What NSN replaces 2920-00-374-4745?

There are 12 known substitutes for 2920-00-374-4745: 1620-00-024-6346, 5120-00-116-3088, 5820-00-230-0454 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MX2563C25?

Key specifications for MX2563C25: General Characteristics Item Description: STEEL;0.562 IN. ID;2.000 IN. OD;1.375 IN. H IN. 1 total characteristics are documented in the Federal Logistics Information System.

Is NSN 2920-00-374-4745 still in active supply?

NSN 2920-00-374-4745 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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