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66880 — INSERT,ENGINE VALVE SEAT

✓ Government record, cited
Clementoni · TAPERED BEARING
PRODUCT OVERVIEW

66880: INSERT,ENGINE VALVE SEAT.

The INSERT,ENGINE VALVE SEAT is a Clementoni industrial component. Key specifications include material: STEEL OVERALL, overall_height: 0.156 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN, style_designator: PLAIN, body_inside_diameter: 1.556 INCHES MINIMUM AND 1.570 INCHES MAXIMUM IN, body_outside_diameter: 1.846 INCHES MINIMUM AND 1.847 INCHES MAXIMUM IN, seating_surface_shape: FLAT. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-113-3664, 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
66880
NSN: 3110-00-113-3664
NIINs: 001133664, 003430244
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 93835 — PARKER HANNIFIN CORPORATION DIV HYDRAULIC SYSTEMS DIVISION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_height0.156 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN
style_designatorPLAIN
body_inside_diameter1.556 INCHES MINIMUM AND 1.570 INCHES MAXIMUM IN
body_outside_diameter1.846 INCHES MINIMUM AND 1.847 INCHES MAXIMUM IN
seating_surface_shapeFLAT
NSN3110-00-113-3664
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 66880 · Clementoni ⚠ 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
•
LOCATING FEATURE: NONLOCATING
•
SURFACE FINISH: GROUND
•
OVERALL OUTSIDE DIAMETER: 1.9370 INCHES NOMINAL IN
•
BORE SHAPE: STRAIGHT
•
STANDARD TOLERANCE DESIGNATION: RBEC NO.5
•
BORE DIAMETER: 1.5125 INCHES NOMINAL IN
•
MATERIAL: COPPER ALLOY RETAINER
TECHNICAL CHARACTERISTICS
LOCATING FEATURENONLOCATING
SURFACE FINISHGROUND
OVERALL WIDTH0.3780 INCHES NOMINAL IN
OVERALL OUTSIDE DIAMETER1.9370 INCHES NOMINAL IN
BORE SHAPESTRAIGHT
STANDARD TOLERANCE DESIGNATIONRBEC NO.5
BORE DIAMETER1.5125 INCHES NOMINAL IN
MATERIALCOPPER ALLOY RETAINER
SUBSTITUTES & CROSS-REFERENCES 1
1906UMR302Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandDemilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is 66880?
66880 is a INSERT,ENGINE VALVE SEAT manufactured by Clementoni.
What parts can replace 66880?
There is 1 known substitute for 66880: 1906UMR302. Substitute compatibility should be verified for your specific system.
What is the NSN for 66880?
66880 is cataloged in the U.S. Government catalog under NSN 3110-00-113-3664. 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.