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M451AS — BEARING,ROLLER,NEEDLE

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

M451AS: BEARING,ROLLER,NEEDLE.

The BEARING,ROLLER,NEEDLE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 8.1 MILLIMETERS MINIMUM AND 8.5 MILLIMETERS MAXIMUM MM, hardness_rating: 44.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM, outside_diameter: 14.8 MILLIMETERS MAXIMUM MM, style_designator: SPLIT HELICAL-RIGHT HAND, material_thickness: 1.9 MILLIMETERS MINIMUM AND 2.1 MILLIMETERS MAXIMUM MM. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-227-4220, 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
M451AS
NSN: 3110-00-227-4220
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 5XMS1 — JTEKT BEARINGS NORTH AMERICA LLC DIV KBNA - ORD 1 (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter8.1 MILLIMETERS MINIMUM AND 8.5 MILLIMETERS MAXIMUM MM
hardness_rating44.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM
outside_diameter14.8 MILLIMETERS MAXIMUM MM
style_designatorSPLIT HELICAL-RIGHT HAND
material_thickness1.9 MILLIMETERS MINIMUM AND 2.1 MILLIMETERS MAXIMUM MM
end_item_identificationMRAP - UNIQUE NSN - USED ON 4 MRAP VARIANTS
part_name_assigned_by_controlling_agencyWASHER,8MM,BLACK MM
NSN3110-00-227-4220
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: M451AS · 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
SUBSTITUTES & CROSS-REFERENCES 2
CYRB47Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
100104-4Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 M451AS?
M451AS is a BEARING,ROLLER,NEEDLE.
What parts can replace M451AS?
There are 2 known substitutes for M451AS: CYRB47, 100104-4. Substitute compatibility should be verified for your specific system.
What is the NSN for M451AS?
M451AS is cataloged in the U.S. Government catalog under NSN 3110-00-227-4220. 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.