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PartsTable / COMPONENT / NAS504-8MILG3278A
NAS504-8MILG3278A ✓ 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 BEARING,ROLLER,NEEDLE is a the manufacturer industrial component. Key specifications include material: STEEL COMP E52100 OR STEEL COMP 8620 OR STEEL OR STEEL COMP E50100 OR STEEL COMP E51100 OVERALL, alignment_type: SELF-ALIGNING, special_features: OIL HOLE AND GROOVE IN OUTER AND INNER RINGS, features_provided: ALIGNING RING, surface_treatment: CADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES, lubrication_material: GREASE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-227-2868, 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
NAS504-8MILG3278A
NSN: 3110-00-227-2868
FSC: 3110
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
materialSTEEL COMP E52100 OR STEEL COMP 8620 OR STEEL OR STEEL COMP E50100 OR STEEL COMP E51100 OVERALL
alignment_typeSELF-ALIGNING
special_featuresOIL HOLE AND GROOVE IN OUTER AND INNER RINGS
features_providedALIGNING RING
surface_treatmentCADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES
lubrication_materialGREASE
standard_tolerance_designationAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
lubrication_material_document_and_classificationMIL-G-3278 MIL SPEC SINGLE MATERIAL RESPONSE
NSN3110-00-227-2868
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: NAS504-8MILG3278A · 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
•
ALIGNMENT TYPE: SELF-ALIGNING
•
FEATURES PROVIDED: ALIGNING RING
•
LUBRICATION MATERIAL: GREASE
•
SURFACE TREATMENT: CADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-7420 MIL SPEC 1ST MATERIAL RESPONSE OR 66 FED STD 1ST MATERIAL RESPONSE OR MIL-S-8690 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-7493 MIL SPEC 3RD MATERIAL RESPONSE OR QQ-S-624 FED SPEC 3RD MATERIAL RESPONSE OR QQ-S-633 FED SPEC 3RD MATERIAL RESPONSE OR 66 FED STD 4TH MATERIAL RESPONSE OR 66 FED STD 5TH MATERIAL RESPONSE OVERALL
•
MATERIAL: STEEL COMP E52100 OR STEEL COMP 8620 OR STEEL OR STEEL COMP E50100 OR STEEL COMP E51100 OVERALL
•
STANDARD TOLERANCE DESIGNATION: AFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
TECHNICAL CHARACTERISTICS (FLIS)
ALIGNMENT TYPESELF-ALIGNING
FEATURES PROVIDEDALIGNING RING
SPECIAL FEATURESOIL HOLE AND GROOVE IN OUTER AND INNER RINGS
LUBRICATION MATERIALGREASE
SURFACE TREATMENTCADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-7420 MIL SPEC 1ST MATERIAL RESPONSE OR 66 FED STD 1ST MATERIAL RESPONSE OR MIL-S-8690 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-7493 MIL SPEC 3RD MATERIAL RESPONSE OR QQ-S-624 FED SPEC 3RD MATERIAL RESPONSE OR QQ-S-633 FED SPEC 3RD MATERIAL RESPONSE OR 66 FED STD 4TH MATERIAL RESPONSE OR 66 FED STD 5TH MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP E52100 OR STEEL COMP 8620 OR STEEL OR STEEL COMP E50100 OR STEEL COMP E51100 OVERALL
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-3278 MIL SPEC SINGLE MATERIAL RESPONSE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
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5048Interchangeable
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2020JInterchangeable
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6NBK919YZPANG25Interchangeable
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LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NAS504-8MILG3278A?
NAS504-8MILG3278A is a BEARING,ROLLER,NEEDLE.
What parts can replace NAS504-8MILG3278A?
There are 30 known substitutes for NAS504-8MILG3278A: B48AN800, 5HB21, RM64 and 27 more. Substitute compatibility should be verified for your specific system.
Is NAS504-8MILG3278A still available?
NAS504-8MILG3278A is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026