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B831-2130-4 — BEARING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

B831-2130-4: BEARING,SLEEVE.

The BEARING,SLEEVE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, end_similarity: NOT IDENTICAL, overall_length: 7.630 INCHES NOMINAL IN, shaft_location: ONE END OF WORM, surface_finish: 32.0 MICROINCHES, first_end_style: UNTHREADED CROSS DRILLED. This part is cataloged in the U.S.

Government catalog under NSN 3120-01-501-2809, 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
B831-2130-4
NSN: 3120-01-501-2809
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
end_similarityNOT IDENTICAL
overall_length7.630 INCHES NOMINAL IN
shaft_locationONE END OF WORM
surface_finish32.0 MICROINCHES
first_end_styleUNTHREADED CROSS DRILLED
second_end_styleFLAT KEYWAYS AND INTERNALLY THREADED
special_featuresPROVIDED WITH INTERNAL 1.000-5 RH ACME 2G THREADS G
worm_body_length9.500 INCHES NOMINAL IN
worm_helix_angle4DEG18MIN
worm_thread_lead0.200 INCHES NOMINAL IN
first_end_diameter2.9980 INCHES MINIMUM AND 3.0000 INCHES MAXIMUM IN
NSN3120-01-501-2809
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: B831-2130-4 · 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
SUBSTITUTES & CROSS-REFERENCES 1
596-7409665Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is B831-2130-4?
B831-2130-4 is a BEARING,SLEEVE.
What parts can replace B831-2130-4?
There is 1 known substitute for B831-2130-4: 596-7409665. Substitute compatibility should be verified for your specific system.
What is the NSN for B831-2130-4?
B831-2130-4 is cataloged in the U.S. Government catalog under NSN 3120-01-501-2809. 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.