PartsTable
Technical Data Sheet
PartsTable / MRO / 641-4
641-4 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Cup and cone sold separately — confirm both needed Timken series numbers indicate dimensions
Cup and cone NOT sold as set — verify order
PRODUCT OVERVIEW

RESISTOR,FIXED,WIRE WOUND,INDUCT. Key specifications include material: STEEL OVERALL, tube_type: TRIODE, base_style: TWO SCREW TERMINALS, body_width: 1.156 INCHES MINIMUM AND 1.188 INCHES MAXIMUM IN, bore_shape: STRAIGHT, bulb_style: PAR (PARABOLIC, ALUMINIZED REFLECTOR). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-144-8569, 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
MRO→ MRO_GENERAL→ 641-4
NSN: 3110-00-144-8569
FSC: 3110
CAGE: 80038 — EQUITABLE BEARING CO INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
tube_typeTRIODE
base_styleTWO SCREW TERMINALS
body_width1.156 INCHES MINIMUM AND 1.188 INCHES MAXIMUM IN
bore_shapeSTRAIGHT
bulb_stylePAR (PARABOLIC, ALUMINIZED REFLECTOR)
head_stylePAN
body_height2.940 INCHES NOMINAL IN
body_length1.656 INCHES MINIMUM AND 1.688 INCHES MAXIMUM IN
head_height0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN
thread_class2A A
body_materialMETAL
NSN3110-00-144-8569
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 641-4 · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
OVERALL OUTSIDE DIAMETER: 180.00 MILLIMETERS NOMINAL MM
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
STANDARD TOLERANCE DESIGNATION: ABEC NO.1
•
LOAD DIRECTION: RADIAL
•
MATERIAL: STEEL OVERALL
•
BORE SHAPE: STRAIGHT
•
SPECIFICATION/STANDARD DATA: 81348-FF-B-171 GOVERNMENT SPECIFICATION
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL WIDTH42.0 MILLIMETERS NOMINAL MM
OVERALL OUTSIDE DIAMETER180.00 MILLIMETERS NOMINAL MM
INTERNAL FIT-UP DESIGNATIONSTANDARD
STANDARD TOLERANCE DESIGNATIONABEC NO.1
LOAD DIRECTIONRADIAL
MATERIALSTEEL OVERALL
BORE SHAPESTRAIGHT
SPECIFICATION/STANDARD DATA81348-FF-B-171 GOVERNMENT SPECIFICATION
NONDEFINITIVE SPEC/STD DATA111 TYPE AND 1 CLASS AND 00 GRADE
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
3414Interchangeable
interchangeable cross-reference
interchangeable
918Interchangeable
interchangeable cross-reference
interchangeable
803-2177518-12XX-34Interchangeable
interchangeable cross-reference
interchangeable
217634Interchangeable
interchangeable cross-reference
interchangeable
217634PC1Interchangeable
interchangeable cross-reference
interchangeable
313-63-4ALT3PC1T022Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 641-4?
641-4 is a RESISTOR,FIXED,WIRE WOUND,INDUCT. It is classified as a MRO (MRO_GENERAL).
What parts can replace 641-4?
There are 24 known substitutes for 641-4: 3414, 918, 803-2177518-12XX-34 and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 641-4?
641-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-144-8569. 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