PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MC4Mercury Commutator

Scientific Prototype Mfg Corp · NSN 6640-00-241-0951 · FSC 6640 · No Item Name Available
Verified by PartsTable
NSN 6640-00-241-0951 — this item is cataloged by the U.S. Government under National Stock Number 6640-00-241-0951. Primary manufacturer part number: MC4.
Features
  • Mercury Commutator — FSC 6640
  • 1 verified cross-reference
  • Primary manufacturer: Scientific Prototype Mfg Corp
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Mercury Commutator, cataloged under National Stock Number 6640-00-241-0951, is classified within Federal Supply Class 6640 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Scientific Prototype Mfg Corp. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameMercury Commutator
FSC / FSG6640 — No Item Name Available (FSG 66)
ManufacturersScientific Prototype Mfg Corp (CAGE 25235)
Technical Specifications
ParameterValue
NSN6640-00-241-0951
Primary Part NumberMC4
Item NameMercury Commutator
FSC / FSG6640 / 66 — No Item Name Available
ManufacturerScientific Prototype Mfg Corp
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
3455-00-236-14734547007 INTERCHANGEABLE
Cutter,milling,end
Black & Company
3950-00-241-8092 INTERCHANGEABLE
Crane Truck,warehouse
3810-00-273-3020 INTERCHANGEABLE
Crane-Shovel,basic Unit,truck Mo
6115-00-897-57048D28-8A INTERCHANGEABLE
Generator Set,gasoline Engine
John Deer Consumer Products Inc
6930-00-949-3359MC4 INTERCHANGEABLE
Timer,mult-Cam
Essex Products Group, Inc. Dba Industrial Timer Company
5805-01-053-6211MC4 INTERCHANGEABLE
Panel,telephone Switchboard
Siemon Company the
6110-01-332-8679MC4 INTERCHANGEABLE
Controller,motor
Klinger Associates
Cross-Reference Index
Part NumberManufacturer
MC4 PRIMARY Scientific Prototype Mfg Corp (USA)
Related Parts
3455-00-236-1473INTERCHANGEABLE
CUTTER,MILLING,END
4547007
3950-00-241-8092INTERCHANGEABLE
CRANE TRUCK,WAREHOUSE
3810-00-273-3020INTERCHANGEABLE
CRANE-SHOVEL,BASIC UNIT,TRUCK MO
6115-00-897-5704INTERCHANGEABLE
GENERATOR SET,GASOLINE ENGINE
8D28-8A
6930-00-949-3359INTERCHANGEABLE
TIMER,MULT-CAM
MC4
5805-01-053-6211INTERCHANGEABLE
PANEL,TELEPHONE SWITCHBOARD
MC4
6110-01-332-8679INTERCHANGEABLE
CONTROLLER,MOTOR
MC4

Frequently Asked Questions

What is NSN 6640-00-241-0951?

NSN 6640-00-241-0951 is a Mercury Commutator, manufactured by Scientific Prototype Mfg Corp, classified under FSC 6640 (No Item Name Available). Status: active.

What are the part numbers for NSN 6640-00-241-0951?

NSN 6640-00-241-0951 has 1 cross-referenced part number: MC4 (Scientific Prototype Mfg Corp).

What NSN replaces 6640-00-241-0951?

There are 7 known substitutes for 6640-00-241-0951: 3455-00-236-1473, 3950-00-241-8092, 3810-00-273-3020 and 4 more. Verify interchangeability with system specifications before substitution.

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