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DAS4-20A1-501 — BEARING,ROLLER,AIRFRAME

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

DAS4-20A1-501: BEARING,ROLLER,AIRFRAME.

The BEARING,ROLLER,AIRFRAME is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC SEAL, bore_diameter: 0.2500 INCHES NOMINAL IN, inner_ring_width: 1.0000 INCHES NOMINAL IN, outer_ring_width: 0.7500 INCHES NOMINAL IN, style_designator: CONCAVE ROLLERS, DOUBLE CLOSURE, SELF ALIGNING, bearing_seal_type: CONTACT. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-516-5487, 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
DAS4-20A1-501
NSN: 3110-00-516-5487
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 77896 — REXNORD INDUSTRIES, LLC DIV AEROSSPACE BEARING OPERATION (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC SEAL
bore_diameter0.2500 INCHES NOMINAL IN
seal_quantity2
inner_ring_width1.0000 INCHES NOMINAL IN
outer_ring_width0.7500 INCHES NOMINAL IN
special_features12 DEG SELF ALIGNMENT IN EITHER DIRECTION; LUBRICANT HOLE AND GROOVE INOD OF OUTER RING AND HEAT TREATED COLLARS IN INNER RING; STEEL RETAINING WASHER
style_designatorCONCAVE ROLLERS, DOUBLE CLOSURE, SELF ALIGNING
bearing_seal_typeCONTACT
surface_treatmentCADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES
lubrication_materialGREASE
overall_outside_diameter1.2500 INCHES NOMINAL IN
lubrication_material_document_and_classificationMIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE
NSN3110-00-516-5487
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: DAS4-20A1-501 · 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
•
BEARING SEAL TYPE: CONTACT
•
LUBRICATION MATERIAL: GREASE
•
OUTER RING WIDTH: 0.7500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CONCAVE ROLLERS, DOUBLE CLOSURE, SELF ALIGNING
•
OVERALL OUTSIDE DIAMETER: 1.2500 INCHES NOMINAL IN
•
SURFACE TREATMENT: CADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES
•
SEAL QUANTITY: 2
TECHNICAL CHARACTERISTICS
BEARING SEAL TYPECONTACT
LUBRICATION MATERIALGREASE
OUTER RING WIDTH0.7500 INCHES NOMINAL IN
STYLE DESIGNATORCONCAVE ROLLERS, DOUBLE CLOSURE, SELF ALIGNING
OVERALL OUTSIDE DIAMETER1.2500 INCHES NOMINAL IN
SPECIAL FEATURES12 DEG SELF ALIGNMENT IN EITHER DIRECTION; LUBRICANT HOLE AND GROOVE INOD OF OUTER RING AND HEAT TREATED COLLARS IN INNER RING; STEEL RETAINING WASHER
SURFACE TREATMENTCADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES
SEAL QUANTITY2
BORE DIAMETER0.2500 INCHES NOMINAL IN
MATERIALSTEEL OUTER RING
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 1
A4AMILG3278Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is DAS4-20A1-501?
DAS4-20A1-501 is a BEARING,ROLLER,AIRFRAME.
What parts can replace DAS4-20A1-501?
There is 1 known substitute for DAS4-20A1-501: A4AMILG3278. Substitute compatibility should be verified for your specific system.
What is the NSN for DAS4-20A1-501?
DAS4-20A1-501 is cataloged in the U.S. Government catalog under NSN 3110-00-516-5487. 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.