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21-1603 — BEARING,BALL,ANNULAR

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

21-1603: BEARING,BALL,ANNULAR.

The BEARING,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include fsc_application_data: INDICATOR,TEMPERATURE, general_characteristics_item_description: INCLUDES JEWEL SCREW ASSEMBLY. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-555-5432, 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
21-1603
NSN: 3110-00-555-5432
NIINs: 005555432, 010726867
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 92392 — ALLIS-CHALMERS CORP (USA)
SPECIFICATIONS
fsc_application_dataINDICATOR,TEMPERATURE
general_characteristics_item_descriptionINCLUDES JEWEL SCREW ASSEMBLY
NSN3110-00-555-5432
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 21-1603 · 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
•
RETAINER FABRICATION METHOD: PRESSED
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
SURFACE FINISH: GROUND
•
STYLE DESIGNATOR: NON-LOADING GROOVE, NON-SEPARABLE
•
OVERALL OUTSIDE DIAMETER: 72.00 MILLIMETERS NOMINAL MM
•
BORE SHAPE: STRAIGHT
•
LOAD DIRECTION: RADIAL
TECHNICAL CHARACTERISTICS
RETAINER FABRICATION METHODPRESSED
INTERNAL FIT-UP DESIGNATIONSTANDARD
SURFACE FINISHGROUND
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE
OVERALL WIDTH17.0 MILLIMETERS NOMINAL MM
OVERALL OUTSIDE DIAMETER72.00 MILLIMETERS NOMINAL MM
BORE SHAPESTRAIGHT
LOAD DIRECTIONRADIAL
ALIGNMENT TYPESELF-ALIGNING
STANDARD TOLERANCE DESIGNATIONABEC NO.1
SUBSTITUTES & CROSS-REFERENCES 7
12708AReference document
Same NSN cross-reference
Reference document — Secondary reference
0211603Reference document
Same NSN cross-reference
Reference document — Secondary reference
1207Reference document
Same NSN cross-reference
Reference document — Secondary reference
01845-1226Reference document
Same NSN cross-reference
Reference document — Secondary reference
KB131Reference document
Same NSN cross-reference
Reference document — Secondary reference
FFB171Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21-1603?
21-1603 is a BEARING,BALL,ANNULAR.
What parts can replace 21-1603?
There are 7 known substitutes for 21-1603: 12708A, 0211603, 1207 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21-1603?
21-1603 is cataloged in the U.S. Government catalog under NSN 3110-00-555-5432. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.