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Technical Data Sheet
PartsTable / COMPONENT / 850-4
850-4 ✓ Verified by PartsTable
Melissa & Doug · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The CLUTCH ASSEMBLY,FRICTION is a Melissa & Doug industrial component. Key specifications include phase: SINGLE LOCATION NOT OTHERWISE SPECIFIED, material: STEEL, bore_shape: STRAIGHT, scale_type: CONCENTRIC DIAL, bonnet_type: INSIDE SCREW, design_type: FLUCTUATING. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6625-01-069-0955, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
850-4
NSN: 6625-01-069-0955
FSC: 6625
CAGE: 31894 — RA-NAV LABORATORIES INC (USA)
SPECIFICATIONS
phaseSINGLE LOCATION NOT OTHERWISE SPECIFIED
materialSTEEL
bore_shapeSTRAIGHT
scale_typeCONCENTRIC DIAL
bonnet_typeINSIDE SCREW
design_typeFLUCTUATING
stem_length2.500 INCHES NOMINAL IN
corner_shapeSQUARE ALL CORNERS
bore_diameter20.00 MILLIMETERS NOMINAL MM
dial_diameter2.000 INCHES NOMINAL IN
overall_width0.6250 INCHES NOMINAL IN
seal_quantity1
NSN6625-01-069-0955
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: Melissa & Doug CLUTCH ASSEMBLY,FRICTION TITLE COMPONENT PN 850-4 MFR Melissa & Doug CLUTCH ASSEMBLY,FRICTI
KEY FEATURES
•
PHASE: SINGLE LOCATION NOT OTHERWISE SPECIFIED
•
ELECTRICAL POWER SOURCE RELATIONSHIP: OPERATING
•
MAJOR COMPONENTS: ANALYZER, TELETYPEWRITER SIGNALS, GENERATOR TEST MESSAGE, CABLE ASSEMBLY, SPECIAL PURPOSE, ELECTRICAL
•
ENCLOSURE FEATURE: MULTIPLE ITEM W/HOUSING
•
FREQUENCY RATING: 60.0 HERTZ NOMINAL LOCATION NOT OTHERWISE SPECIFIED
•
TEST TYPE FOR WHICH DESIGNED: SIGNAL DISTORTION DIFFERENTIAL DELAY RATE, BIT ERROR RATE DETERMINATION, DISTORATION MONITORING
•
AC VOLTAGE RATING: 105.0 VOLTS MINIMUM AND 125.0 VOLTS MAXIMUM LOCATION NOT OTHERWISE SPECIFIED
TECHNICAL CHARACTERISTICS (FLIS)
PHASESINGLE LOCATION NOT OTHERWISE SPECIFIED
ELECTRICAL POWER SOURCE RELATIONSHIPOPERATING
MAJOR COMPONENTSANALYZER, TELETYPEWRITER SIGNALS, GENERATOR TEST MESSAGE, CABLE ASSEMBLY, SPECIAL PURPOSE, ELECTRICAL
ENCLOSURE FEATUREMULTIPLE ITEM W/HOUSING
FREQUENCY RATING60.0 HERTZ NOMINAL LOCATION NOT OTHERWISE SPECIFIED
TEST TYPE FOR WHICH DESIGNEDSIGNAL DISTORTION DIFFERENTIAL DELAY RATE, BIT ERROR RATE DETERMINATION, DISTORATION MONITORING
AC VOLTAGE RATING105.0 VOLTS MINIMUM AND 125.0 VOLTS MAXIMUM LOCATION NOT OTHERWISE SPECIFIED
PHASESINGLE LOCATION NOT OTHERWISE SPECIFIED
ELECTRICAL POWER SOURCE RELATIONSHIPOPERATING
MAJOR COMPONENTSANALYZER, TELETYPEWRITER SIGNALS, GENERATOR TEST MESSAGE, CABLE ASSEMBLY, SPECIAL PURPOSE, ELECTRICAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
8594Interchangeable
interchangeable cross-reference
interchangeable
204FS2-90Interchangeable
interchangeable cross-reference
interchangeable
8504Interchangeable
interchangeable cross-reference
interchangeable
64A92B968Interchangeable
interchangeable cross-reference
interchangeable
2281-0015007Interchangeable
interchangeable cross-reference
interchangeable
H504Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 850-4?
850-4 is a CLUTCH ASSEMBLY,FRICTION manufactured by Melissa & Doug.
What parts can replace 850-4?
There are 16 known substitutes for 850-4: 8594, 204FS2-90, 8504 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 850-4?
850-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 6625-01-069-0955. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026