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Technical Data Sheet
PartsTable / COMPONENT / T12-3
T12-3 ✓ Verified by PartsTable
— · TAPERED BEARING
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 TAPPET,ENGINE POPPET VALVE is a the manufacturer industrial component. Key specifications include length: 0.750 INCHES NOMINAL SQUARE END IN, material: STEEL OVERALL, cup_width: 0.9375 INCHES NOMINAL IN, bore_shape: STRAIGHT BOTH ENDS, cone_width: 1.1875 INCHES NOMINAL IN, bore_length: 1.2500 INCHES NOMINAL THROUGH BORE IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-100-5942, 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
T12-3
NSN: 3110-00-100-5942
FSC: 3110
CAGE: 66821 — YALE SECURITY INC. DBA NORTON DOOR CONTROL (USA)
SPECIFICATIONS
length0.750 INCHES NOMINAL SQUARE END IN
materialSTEEL OVERALL
cup_width0.9375 INCHES NOMINAL IN
bore_shapeSTRAIGHT BOTH ENDS
cone_width1.1875 INCHES NOMINAL IN
bore_length1.2500 INCHES NOMINAL THROUGH BORE IN
design_typeBONDED RUBBER
bore_diameter0.2498 INCHES NOMINAL BOTH ENDS IN
overall_width1.1875 INCHES NOMINAL IN
physical_formLIQUID
thread_length2.500 INCHES MINIMUM IN
flute_quantity4
NSN3110-00-100-5942
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: T12-3 · 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
•
CUP WIDTH: 0.9375 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: STRAIGHT BORE, NORMAL ANGLE
•
CONE CORNER RADIUS: 0.1400 INCHES NOMINAL IN
•
NONDEFINITIVE SPEC/STD DATA: 751 TYPE
•
STANDOUT WIDTH: 0.2500 INCHES NOMINAL IN
•
BORE DIAMETER: 1.6250 INCHES NOMINAL IN
•
CONE WIDTH: 1.1875 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CUP WIDTH0.9375 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
STYLE DESIGNATORSTRAIGHT BORE, NORMAL ANGLE
CONE CORNER RADIUS0.1400 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATA751 TYPE
STANDOUT WIDTH0.2500 INCHES NOMINAL IN
BORE DIAMETER1.6250 INCHES NOMINAL IN
CONE WIDTH1.1875 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.1250 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
55424Interchangeable
interchangeable cross-reference
interchangeable
5424Interchangeable
interchangeable cross-reference
interchangeable
C937-1Interchangeable
interchangeable cross-reference
interchangeable
125696Interchangeable
interchangeable cross-reference
interchangeable
B94.9Interchangeable
interchangeable cross-reference
interchangeable
13153Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is T12-3?
T12-3 is a TAPPET,ENGINE POPPET VALVE.
What parts can replace T12-3?
There are 25 known substitutes for T12-3: 55424, 5424, C937-1 and 22 more. Substitute compatibility should be verified for your specific system.
Is T12-3 still available?
T12-3 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026