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AT05SS020 — BEARING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

AT05SS020: BEARING,SLEEVE.

The BEARING,SLEEVE is a the manufacturer industrial component. Key specifications include corner_shape: SQUARE ALL CORNERS, overall_length: 0.6150 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN, surface_finish: 63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY, hardness_rating: 27.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OUTER LAYER, style_designator: SOLID, PLAIN, NO OUTSIDE FLANGES, body_inside_diameter: 0.3130 INCHES MINIMUM AND 0.3190 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-01-042-8903, 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
AT05SS020
NSN: 3120-01-042-8903
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 15860 — NEW HAMPSHIRE BALL BEARINGS INC DIV ASTRO DIVISION (USA)
SPECIFICATIONS
materialPLASTIC POLYTETRAFLUOROETHYLENE AND GLASS FIBER OR PLASTIC POLYTETRAFLUOROETHYLENE AND PLASTIC POLYETHYLENE TEREPHTHALATE (PET)(POLYESTER) INNER LAYER
corner_shapeSQUARE ALL CORNERS
overall_length0.6150 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN
surface_finish63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY
hardness_rating27.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OUTER LAYER
style_designatorSOLID, PLAIN, NO OUTSIDE FLANGES
body_inside_diameter0.3130 INCHES MINIMUM AND 0.3190 INCHES MAXIMUM IN
body_outside_diameter0.4381 INCHES MINIMUM AND 0.4386 INCHES MAXIMUM IN
NSN3120-01-042-8903
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: AT05SS020 · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SURFACE FINISH: 63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY
•
CORNER SHAPE: SQUARE ALL CORNERS
•
BODY OUTSIDE DIAMETER: 0.4381 INCHES MINIMUM AND 0.4386 INCHES MAXIMUM IN
•
HARDNESS RATING: 27.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OUTER LAYER
•
STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES
TECHNICAL CHARACTERISTICS
SURFACE FINISH63.0 MICROINCHES OUTSIDE DIAMETER SURFACE OF BODY
SURFACE FINISH125.0 MICROINCHES RIGHT END SURFACE OF BODY
SURFACE FINISH125.0 MICROINCHES LEFT END SURFACE OF BODY
SURFACE FINISH125.0 MICROINCHES INNER MEMBER
CORNER SHAPESQUARE ALL CORNERS
BODY OUTSIDE DIAMETER0.4381 INCHES MINIMUM AND 0.4386 INCHES MAXIMUM IN
HARDNESS RATING27.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OUTER LAYER
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
OVERALL LENGTH0.6150 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN
BODY INSIDE DIAMETER0.3130 INCHES MINIMUM AND 0.3190 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 3120 — Bearings, Plain, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3120-00-001-1288 3120-00-001-1835 3120-00-001-1838 3120-00-001-1928 3120-00-001-1934 3120-00-001-3933 3120-00-001-3937 3120-00-001-3938
SUBSTITUTES & CROSS-REFERENCES 3
BJ10TH-020Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
101-2005-020Reference document
Same NSN cross-reference
Reference document — Secondary reference
GB528AU05C020Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AT05SS020?
AT05SS020 is a BEARING,SLEEVE.
What parts can replace AT05SS020?
There are 3 known substitutes for AT05SS020: BJ10TH-020, 101-2005-020, GB528AU05C020. Substitute compatibility should be verified for your specific system.
What is the NSN for AT05SS020?
AT05SS020 is cataloged in the U.S. Government catalog under NSN 3120-01-042-8903. This indicates validated use in U.S. government and defense supply chains.
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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.