PartsTable
Technical Data Sheet
PartsTable / MRO / 257-8
257-8 ✓ 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

The SWITCH,CODE INDICATING WHEEL is a the manufacturer industrial component. Key specifications include color: BLACK EACH INDICATOR BACKGROUND, material: PAPER FILTERING MEDIUM, body_style: STRAIGHT SHAPE W/FLANGE, cone_width: 0.9983 INCHES NOMINAL IN, shell_type: SOLID, design_type: NONREUSABLE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0727, 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→ 257-8
NSN: 3110-00-100-0727
FSC: 3110
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
colorBLACK EACH INDICATOR BACKGROUND
materialPAPER FILTERING MEDIUM
body_styleSTRAIGHT SHAPE W/FLANGE
cone_width0.9983 INCHES NOMINAL IN
shell_typeSOLID
design_typeNONREUSABLE
thread_class2A AND 2B A
actuator_typeTHUMBWHEEL ALL ACTUATORS
bore_diameter1.1250 INCHES NOMINAL IN
overall_width1.000 INCHES NOMINAL IN
physical_formLIQUID
terminal_typeWIRE LEAD
NSN3110-00-100-0727
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 257-8 · 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
•
CONE CORNER RADIUS: 0.0938 INCHES NOMINAL IN
•
CONE WIDTH: 0.9983 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NORMAL ANGLE
•
BORE DIAMETER: 1.1250 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
TECHNICAL CHARACTERISTICS (FLIS)
CONE CORNER RADIUS0.0938 INCHES NOMINAL IN
CONE WIDTH0.9983 INCHES NOMINAL IN
STYLE DESIGNATORNORMAL ANGLE
BORE DIAMETER1.1250 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
2940001419026Interchangeable
interchangeable cross-reference
interchangeable
83317CSInterchangeable
interchangeable cross-reference
interchangeable
C25Interchangeable
interchangeable cross-reference
interchangeable
2578Interchangeable
interchangeable cross-reference
interchangeable
4-02641-002Interchangeable
interchangeable cross-reference
interchangeable
10095445-101Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 257-8?
257-8 is a SWITCH,CODE INDICATING WHEEL. It is classified as a MRO (MRO_GENERAL).
What parts can replace 257-8?
There are 18 known substitutes for 257-8: 2940001419026, 83317CS, C25 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 257-8?
257-8 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-0727. 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