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AS156621 — BEARING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

AS156621: BEARING,SLEEVE.

The BEARING,SLEEVE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 8740 OVERALL, corner_shape: SQUARE OUTSIDE LEFT CORNER, flange_width: 0.1320 INCHES NOMINAL IN, overall_length: 1.9780 INCHES MINIMUM AND 1.9800 INCHES MAXIMUM IN, hardness_rating: 34.0 ROCKWELL C NOMINAL OVERALL, special_features: FLANGE IS SPLINED. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-393-7738, 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
AS156621
NSN: 3120-00-393-7738
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 12776 — AIRCRAFT SUPPLIES (USA)
SPECIFICATIONS
materialSTEEL COMP 8740 OVERALL
corner_shapeSQUARE OUTSIDE LEFT CORNER
flange_width0.1320 INCHES NOMINAL IN
overall_length1.9780 INCHES MINIMUM AND 1.9800 INCHES MAXIMUM IN
hardness_rating34.0 ROCKWELL C NOMINAL OVERALL
special_featuresFLANGE IS SPLINED
style_designatorSOLID, EXTERNAL FLANGE ONE END
precious_materialSILVER
surface_treatmentLEAD OUTSIDE DIAMETER SURFACE OF BODY
body_inside_diameter4.3130 INCHES MINIMUM AND 4.3180 INCHES MAXIMUM IN
body_outside_diameter4.8655 INCHES MINIMUM AND 4.8675 INCHES MAXIMUM IN
flange_outside_diameter5.3700 INCHES MINIMUM AND 5.3900 INCHES MAXIMUM IN
NSN3120-00-393-7738
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: AS156621 · 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
•
CORNER SHAPE: CHAMFERED INSIDE LEFT CORNER
•
FLANGE OUTSIDE DIAMETER: 5.3700 INCHES MINIMUM AND 5.3900 INCHES MAXIMUM IN
•
PRECIOUS MATERIAL: SILVER
TECHNICAL CHARACTERISTICS
CORNER SHAPECHAMFERED INSIDE LEFT CORNER
CORNER SHAPESQUARE LEFT FLANGE BODY CORNER
CORNER SHAPESQUARE OUTSIDE LEFT CORNER
CORNER SHAPESQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
CORNER SHAPECHAMFERED INSIDE RIGHT CORNER
CORNER SHAPECHAMFERED OUTSIDE RIGHT CORNER
FLANGE OUTSIDE DIAMETER5.3700 INCHES MINIMUM AND 5.3900 INCHES MAXIMUM IN
PRECIOUS MATERIALSILVER
BODY OUTSIDE DIAMETER4.8655 INCHES MINIMUM AND 4.8675 INCHES MAXIMUM IN
HARDNESS RATING34.0 ROCKWELL C NOMINAL OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
156621Reference 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 AS156621?
AS156621 is a BEARING,SLEEVE.
What parts can replace AS156621?
There is 1 known substitute for AS156621: 156621. Substitute compatibility should be verified for your specific system.
What is the NSN for AS156621?
AS156621 is cataloged in the U.S. Government catalog under NSN 3120-00-393-7738. 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.