PartsTable
Technical Data Sheet
PartsTable / COMPONENT / GT-21
GT-21 ✓ Verified by PartsTable
— · BALL BEARING
WHAT YOU NEED TO KNOW
2RS = sealed for life, ZZ = shielded re-greaseable ABEC grade: higher = tighter tolerance
ABEC-1 standard, ABEC-7+ for precision spindles
PRODUCT OVERVIEW

The UNIVERSAL JOINT,AIRCRAFT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, corner_shape: CHAMFERED OUTSIDE LEFT CORNER, flange_width: 0.1820 INCHES MINIMUM AND 0.1860 INCHES MAXIMUM IN, alignment_type: RIGID, overall_height: 0.8125 INCHES NOMINAL IN, overall_length: 0.9810 INCHES MINIMUM AND 0.9880 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-966-6348, 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
GT-21
NSN: 3120-00-966-6348
FSC: 3120
CAGE: 0AJV0 — SCHAEFFLER GROUP USA INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
corner_shapeCHAMFERED OUTSIDE LEFT CORNER
flange_width0.1820 INCHES MINIMUM AND 0.1860 INCHES MAXIMUM IN
alignment_typeRIGID
overall_height0.8125 INCHES NOMINAL IN
overall_length0.9810 INCHES MINIMUM AND 0.9880 INCHES MAXIMUM IN
surface_finishGROUND
special_featuresPOLYTETRAFLUOROETHYLENE FABRIC BONDED TO ID OF OUTER LAYER,OUTSIDE SURFACE OF INNER LAYER FINISHED TO 6 MICROINCH FINISH,OD OF INNER LAYER CHROME PLATED
style_designatorGROOVED RACE SURFACE
surface_treatmentPASSIVATE OUTSIDE DIAMETER SURFACE OF BODY
body_inside_diameter0.7500 INCHES MINIMUM AND 0.7505 INCHES MAXIMUM IN
body_outside_diameter1.1890 INCHES MINIMUM AND 1.1895 INCHES MAXIMUM IN
NSN3120-00-966-6348
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: GT-21 · 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 OUTSIDE LEFT CORNER
•
SURFACE TREATMENT: PASSIVATE RIGHT END SURFACE OF LEFT FLANGE
•
BODY OUTSIDE DIAMETER: 1.1890 INCHES MINIMUM AND 1.1895 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CORNER SHAPECHAMFERED OUTSIDE LEFT CORNER
SURFACE TREATMENTPASSIVATE RIGHT END SURFACE OF LEFT FLANGE
CORNER SHAPEROUND LEFT FLANGE BODY CORNER
SPECIAL FEATURESPOLYTETRAFLUOROETHYLENE FABRIC BONDED TO ID OF OUTER LAYER,OUTSIDE SURFACE OF INNER LAYER FINISHED TO 6 MICROINCH FINISH,OD OF INNER LAYER CHROME PLATED
BODY OUTSIDE DIAMETER1.1890 INCHES MINIMUM AND 1.1895 INCHES MAXIMUM IN
OVERALL LENGTH0.9810 INCHES MINIMUM AND 0.9880 INCHES MAXIMUM IN
SURFACE TREATMENTPASSIVATE RIGHT END SURFACE OF BODY
SURFACE TREATMENTPASSIVATE LEFT END SURFACE OF BODY AND FLANGE
SURFACE TREATMENTPASSIVATE OUTSIDE DIAMETER SURFACE OF FLANGE
SURFACE FINISH90.0 MICROINCHES OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
KDJ12-1Interchangeable
interchangeable cross-reference
interchangeable
GT-21Interchangeable
interchangeable cross-reference
interchangeable
F-21Interchangeable
interchangeable cross-reference
interchangeable
KJB428416HInterchangeable
interchangeable cross-reference
interchangeable
3120PL1943858Interchangeable
Same NIIN cross-reference
interchangeable
FBJ24-3YInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy GT-21?
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 GT-21?
GT-21 is a UNIVERSAL JOINT,AIRCRAFT.
What parts can replace GT-21?
There are 8 known substitutes for GT-21: KDJ12-1, GT-21, F-21 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for GT-21?
GT-21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-966-6348. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — GT-21

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026