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255603 PIECE 2 — PLATE,RETAINING,BEARING

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

255603 PIECE 2: PLATE,RETAINING,BEARING.

The PLATE,RETAINING,BEARING is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 903 OVERALL, body_diameter: 4.4960 INCHES MINIMUM AND 4.4970 INCHES MAXIMUM IN, body_thickness: 0.7192 INCHES NOMINAL IN, minor_thickness: 1.3687 INCHES NOMINAL IN, outside_diameter: 4.8125 INCHES NOMINAL IN, special_features: MOUNTING HOLES 0.3125 IN. DEEP; OD THREADED 4.8125 IN.

DIA US-2A A. This part is cataloged in the U.S. Government catalog under NSN 3110-01-328-9293, 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
255603 PIECE 2
NSN: 3110-01-328-9293
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 43689 — HUNTINGTON INGALLS INC DIV NEWPORT NEWS SHIPBUILDING (USA)
SPECIFICATIONS
materialCOPPER ALLOY 903 OVERALL
body_diameter4.4960 INCHES MINIMUM AND 4.4970 INCHES MAXIMUM IN
body_thickness0.7192 INCHES NOMINAL IN
minor_thickness1.3687 INCHES NOMINAL IN
outside_diameter4.8125 INCHES NOMINAL IN
special_featuresMOUNTING HOLES 0.3125 IN. DEEP; OD THREADED 4.8125 IN. DIA US-2A A
style_designatorROUND
aperture_diameter3.0000 INCHES MINIMUM AND 3.0010 INCHES MAXIMUM IN
overall_thickness2.2812 INCHES NOMINAL IN
mounting_hole_typeROUND, UNTHREADED
mounting_hole_diameter0.3281 INCHES NOMINAL IN
first_counterbore_depth0.4100 INCHES MINIMUM AND 0.4150 INCHES MAXIMUM IN
NSN3110-01-328-9293
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 255603 PIECE 2 · 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
•
SECOND COUNTERBORE DEPTH: 0.5000 INCHES NOMINAL IN
•
BODY DIAMETER: 4.4960 INCHES MINIMUM AND 4.4970 INCHES MAXIMUM IN
•
MINOR THICKNESS: 1.3687 INCHES NOMINAL IN
•
BOLT CIRCLE HOLE QUANTITY: 2
•
MOUNTING HOLE TYPE: ROUND, UNTHREADED
•
MOUNTING HOLE ARRANGEMENT STYLE: SINGLE BOLT HOLE CIRCLE
•
OVERALL THICKNESS: 2.2812 INCHES NOMINAL IN
•
FIRST COUNTERBORE DIAMETER: 3.3710 INCHES MINIMUM AND 3.3730 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
SECOND COUNTERBORE DEPTH0.5000 INCHES NOMINAL IN
BODY DIAMETER4.4960 INCHES MINIMUM AND 4.4970 INCHES MAXIMUM IN
MINOR THICKNESS1.3687 INCHES NOMINAL IN
BOLT CIRCLE HOLE QUANTITY2
MOUNTING HOLE TYPEROUND, UNTHREADED
MOUNTING HOLE ARRANGEMENT STYLESINGLE BOLT HOLE CIRCLE
OVERALL THICKNESS2.2812 INCHES NOMINAL IN
FIRST COUNTERBORE DIAMETER3.3710 INCHES MINIMUM AND 3.3730 INCHES MAXIMUM IN
STYLE DESIGNATORROUND
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OTHER ITEMS IN FSC 3110 — Bearings, Antifriction, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3110-00-001-1937 3110-00-001-1938 3110-00-001-4661 3110-00-001-4662 3110-00-001-4689 3110-00-001-4722
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 255603 PIECE 2?
255603 PIECE 2 is a PLATE,RETAINING,BEARING.
What is the NSN for 255603 PIECE 2?
255603 PIECE 2 is cataloged in the U.S. Government catalog under NSN 3110-01-328-9293. 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.