PartsTable
Technical Data Sheet
PartsTable / COMPONENT / MS13991
MS13991 ✓ 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

TERMINAL JUNCTION BLOCK,SECTIONA. Key specifications include corner_shape: SQUARE ALL CORNERS, hole_diameter: 0.2600 INCHES MAXIMUM SECOND IN, style_designator: HALF SLEEVE, PLAIN, NO OUTSIDE FLANGES, locking_lug_width: 0.1900 INCHES MINIMUM AND 0.2200 INCHES MAXIMUM IN, hole_spacing_angle: 40.0 DEGREES NOMINAL, locking_lug_height: 0.0310 INCHES MINIMUM AND 0.0410 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-546-6010, 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
MS13991
NSN: 3120-00-546-6010
FSC: 3120
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
corner_shapeSQUARE ALL CORNERS
hole_diameter0.2600 INCHES MAXIMUM SECOND IN
style_designatorHALF SLEEVE, PLAIN, NO OUTSIDE FLANGES
locking_lug_width0.1900 INCHES MINIMUM AND 0.2200 INCHES MAXIMUM IN
hole_spacing_angle40.0 DEGREES NOMINAL
locking_lug_height0.0310 INCHES MINIMUM AND 0.0410 INCHES MAXIMUM IN
locking_lug_length0.1500 INCHES MINIMUM AND 0.1550 INCHES MAXIMUM IN
body_inside_diameter2.2499 INCHES NOMINAL IN
body_outside_diameter2.3950 INCHES MINIMUM IN
distance_from_lug_end_to_end_of_bearing0.3287 INCHES NOMINAL IN
antirotation/lubrication_type_and_quantity2 HOLE
NSN3120-00-546-6010
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: MS13991 · 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
•
ANTIROTATION/LUBRICATION TYPE AND QUANTITY: 2 HOLE
•
DISTANCE FROM LUG END TO END OF BEARING: 0.3287 INCHES NOMINAL IN
•
BODY INSIDE DIAMETER: 2.2499 INCHES NOMINAL IN
•
STYLE DESIGNATOR: HALF SLEEVE, PLAIN, NO OUTSIDE FLANGES
•
HOLE SPACING ANGLE: 40.0 DEGREES NOMINAL
•
HOLE DIAMETER: 0.2400 INCHES MINIMUM FIRST IN
•
CORNER SHAPE: SQUARE ALL CORNERS
•
BODY OUTSIDE DIAMETER: 2.3950 INCHES MINIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
ANTIROTATION/LUBRICATION TYPE AND QUANTITY2 HOLE
DISTANCE FROM LUG END TO END OF BEARING0.3287 INCHES NOMINAL IN
BODY INSIDE DIAMETER2.2499 INCHES NOMINAL IN
STYLE DESIGNATORHALF SLEEVE, PLAIN, NO OUTSIDE FLANGES
HOLE SPACING ANGLE40.0 DEGREES NOMINAL
HOLE DIAMETER0.2400 INCHES MINIMUM FIRST IN
CORNER SHAPESQUARE ALL CORNERS
BODY OUTSIDE DIAMETER2.3950 INCHES MINIMUM IN
HOLE DIAMETER0.2600 INCHES MAXIMUM SECOND IN
LOCKING LUG LENGTH0.1500 INCHES MINIMUM AND 0.1550 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
3527Interchangeable
interchangeable cross-reference
interchangeable
32380Interchangeable
interchangeable cross-reference
interchangeable
9N9447Interchangeable
interchangeable cross-reference
interchangeable
1902-10Interchangeable
interchangeable cross-reference
interchangeable
695527-6Interchangeable
interchangeable cross-reference
interchangeable
MIL190 210Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
Ready to buy MS13991?
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 MS13991?
MS13991 is a TERMINAL JUNCTION BLOCK,SECTIONA.
What parts can replace MS13991?
There are 8 known substitutes for MS13991: 3527, 32380, 9N9447 and 5 more. Substitute compatibility should be verified for your specific system.
Is MS13991 still available?
MS13991 is currently cancelled.
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 — MS13991

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