PartsTable
Technical Data Sheet
A978 ✓ 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 TRANSFORMER,RADIO FREQUENCY is a the manufacturer industrial component. Key specifications include material: STEEL HEAD, head_style: FLAT, stem_style: DOUBLE GROOVED, head_height: 0.1875 INCHES NOMINAL IN, neck_radius: 0.3125 INCHES NOMINAL IN, stem_length: 4.6775 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-158-6202, 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
A978
NSN: 3110-00-158-6202
FSC: 3110
CAGE: 70801 — AUTOMOTIVE THRUST BEARING CORP (USA)
SPECIFICATIONS
materialSTEEL HEAD
head_styleFLAT
stem_styleDOUBLE GROOVED
head_height0.1875 INCHES NOMINAL IN
neck_radius0.3125 INCHES NOMINAL IN
stem_length4.6775 INCHES NOMINAL IN
stem_diameter0.3125 INCHES NOMINAL IN
chamfer_length0.0625 INCHES NOMINAL IN
outside_diameter1.2500 INCHES NOMINAL IN
seat_angle_in_deg45.0
first_groove_width0.2650 INCHES NOMINAL IN
second_groove_width0.3750 INCHES NOMINAL IN
NSN3110-00-158-6202
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: A978 · 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
THRUST DIRECTIONAL CAPABILITY DESIGNATION: SINGLE
ALIGNMENT TYPE: RIGID
BORE SMALLEST DIAMETER: 2.7490 INCHES MINIMUM AND 2.7500 INCHES MAXIMUM IN
RETAINER FABRICATION METHOD: PRESSED
SURFACE FINISH: GROUND
OVERALL OUTSIDE DIAMETER: 4.4900 INCHES MINIMUM AND 4.5100 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
THRUST DIRECTIONAL CAPABILITY DESIGNATIONSINGLE
ALIGNMENT TYPERIGID
BORE SMALLEST DIAMETER2.7490 INCHES MINIMUM AND 2.7500 INCHES MAXIMUM IN
SPECIAL FEATURESWASHERS OVERLAP,ONE WASHER NOTCHED FOR LUBRICATION
RETAINER FABRICATION METHODPRESSED
SURFACE FINISHGROUND
THRUST DIRECTIONAL CAPABILITY DESIGNATIONSINGLE
OVERALL OUTSIDE DIAMETER4.4900 INCHES MINIMUM AND 4.5100 INCHES MAXIMUM IN
MATERIALCOPPER ALLOY INSERT
SPECIAL FEATURESWASHERS OVERLAP,ONE WASHER NOTCHED FOR LUBRICATION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
6925Interchangeable
interchangeable cross-reference
interchangeable
6925 19240Interchangeable
interchangeable cross-reference
interchangeable
SM-A-571486-3Interchangeable
interchangeable cross-reference
interchangeable
SM-A-571486-1Interchangeable
interchangeable cross-reference
interchangeable
69-692-5Interchangeable
interchangeable cross-reference
interchangeable
3MCFSRPCInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A978?
A978 is a TRANSFORMER,RADIO FREQUENCY.
What parts can replace A978?
There are 30 known substitutes for A978: 6925, 6925 19240, SM-A-571486-3 and 27 more. Substitute compatibility should be verified for your specific system.
Is A978 still available?
A978 is currently cancelled.
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