PartsTable
Technical Data Sheet
Download PDF

21-00139 — BEARING,SLEEVE

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

21-00139: BEARING,SLEEVE.

The BEARING,SLEEVE is a the manufacturer industrial component. Key specifications include special_features: KIT CONSISTS OF BORESCOPE, SHORT BORESCOPE CASE AND TRANSIT CARTON, part_name_assigned_by_controlling_agency: RIGID BORESCOPE KIT. This part is cataloged in the U.S.

Government catalog under NSN 3120-00-737-3553, 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
21-00139
NSN: 3120-00-737-3553
NIINs: 007373553, 015016969, 015953031
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 23862 — MILITARY VEHICLES OPN GENERAL MOTORS TRUCK AND BUS GROUP MS 2603-02 (USA)
SPECIFICATIONS
special_featuresKIT CONSISTS OF BORESCOPE, SHORT BORESCOPE CASE AND TRANSIT CARTON
component_quantity3
part_name_assigned_by_controlling_agencyRIGID BORESCOPE KIT
NSN3120-00-737-3553
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 21-00139 · 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: SQUARE ALL CORNERS
•
BODY OUTSIDE DIAMETER: 1.3740 INCHES MINIMUM AND 1.3760 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-B-13501 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
BODY INSIDE DIAMETER: 1.2520 INCHES MINIMUM AND 1.2530 INCHES MAXIMUM IN
•
MATERIAL: COPPER ALLOY 546-CANCELED OVERALL
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE ALL CORNERS
BODY OUTSIDE DIAMETER1.3740 INCHES MINIMUM AND 1.3760 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-13501 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH0.7500 INCHES NOMINAL IN
BODY INSIDE DIAMETER1.2520 INCHES MINIMUM AND 1.2530 INCHES MAXIMUM IN
MATERIALCOPPER ALLOY 546-CANCELED OVERALL
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
Ready to buy 21-00139?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 21-00139?
21-00139 is a BEARING,SLEEVE.
What is the NSN for 21-00139?
21-00139 is cataloged in the U.S. Government catalog under NSN 3120-00-737-3553. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 21-00139

✓ 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.