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Technical Data Sheet
PartsTable / COMPONENT / 4891-5
4891-5 ✓ Verified by PartsTable
Unold · 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

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include material: STEEL CORROSION RESISTING BODY, body_style: STRAIGHT SHAPE QUICK CONNECT, shell_type: SOLID, flange_width: 0.0420 INCHES NOMINAL IN, thread_class: 2A A, overall_width: 0.800 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 3120-00-691-6771, 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
4891-5
NSN: 3120-00-691-6771
FSC: 3120
CAGE: 75324 — KILGORE FLARES COMPANY LLC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING BODY
body_styleSTRAIGHT SHAPE QUICK CONNECT
shell_typeSOLID
flange_width0.0420 INCHES NOMINAL IN
thread_class2A A
overall_width0.800 INCHES MAXIMUM IN
overall_length1.562 INCHES MAXIMUM IN
shell_materialCOPPER ALLOY
insert_materialPLASTIC ALL MATING ENDS
contact_materialCOPPER ALLOY ALL MATING ENDS SINGLE CONTACT GROUPING
outside_diameter2.430 INCHES NOMINAL IN
style_designatorSOLID, EXTERNAL FLANGE
NSN3120-00-691-6771
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: 4891-5 · Unold ⚠ 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
•
FLANGE OUTSIDE DIAMETER: 0.5200 INCHES MINIMUM AND 0.5400 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SOLID, EXTERNAL FLANGE
•
FLANGE WIDTH: 0.0420 INCHES NOMINAL IN
•
END TO FLANGE DISTANCE: 0.0100 INCHES MINIMUM AND 0.0300 INCHES MAXIMUM IN
•
BODY INSIDE DIAMETER: 0.2500 INCHES MINIMUM AND 0.2506 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 0.4370 INCHES MINIMUM AND 0.4373 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
FLANGE OUTSIDE DIAMETER0.5200 INCHES MINIMUM AND 0.5400 INCHES MAXIMUM IN
STYLE DESIGNATORSOLID, EXTERNAL FLANGE
FLANGE WIDTH0.0420 INCHES NOMINAL IN
END TO FLANGE DISTANCE0.0100 INCHES MINIMUM AND 0.0300 INCHES MAXIMUM IN
BODY INSIDE DIAMETER0.2500 INCHES MINIMUM AND 0.2506 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER0.4370 INCHES MINIMUM AND 0.4373 INCHES MAXIMUM IN
OVERALL LENGTH0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
1250-0253Interchangeable
interchangeable cross-reference
interchangeable
KC94-09Interchangeable
interchangeable cross-reference
interchangeable
4101300-012Interchangeable
interchangeable cross-reference
interchangeable
4891-5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4891-5?
4891-5 is a CONNECTOR,RECEPTACLE,ELECTRICAL manufactured by Unold.
What parts can replace 4891-5?
There are 4 known substitutes for 4891-5: 1250-0253, KC94-09, 4101300-012 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4891-5?
4891-5 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-691-6771. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026