PartsTable
Technical Data Sheet
PartsTable / COMPONENT / R4-11MILG3278
R4-11MILG3278 ✓ 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 BEARING,PLAIN,ROD END is a the manufacturer industrial component. Key specifications include material: GREASE LUBRICATION, shank_style: INTERNALLY THREADED W/BEAD AND WRENCH FLATS AND INSPECTION HOLE, thread_class: 3B, bore_diameter: 0.2495 INCHES MINIMUM AND 0.2515 INCHES MAXIMUM IN, overall_length: 1.9377 INCHES NOMINAL IN, hardness_rating: 60.0 ROCKWELL C MINIMUM AND 63.0 ROCKWELL C MAXIMUM INNER MEMBER. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-512-5165, 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
R4-11MILG3278
NSN: 3120-00-512-5165
FSC: 3120
CAGE: 57448 — STEPHENS-ADAMSON INC A SUB OF ALLIS-CHALMERS CORP (USA)
SPECIFICATIONS
materialGREASE LUBRICATION
shank_styleINTERNALLY THREADED W/BEAD AND WRENCH FLATS AND INSPECTION HOLE
thread_class3B
bore_diameter0.2495 INCHES MINIMUM AND 0.2515 INCHES MAXIMUM IN
overall_length1.9377 INCHES NOMINAL IN
hardness_rating60.0 ROCKWELL C MINIMUM AND 63.0 ROCKWELL C MAXIMUM INNER MEMBER
thread_diameter0.312 INCHES NOMINAL IN
style_designatorBALL TYPE
thread_directionRIGHT-HAND
surface_treatmentNICKEL AND CHROMIUM INNER MEMBER
inner_member_width0.5880 INCHES MINIMUM AND 0.5930 INCHES MAXIMUM IN
outer_member_width0.4330 INCHES MAXIMUM IN
NSN3120-00-512-5165
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: R4-11MILG3278 · 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
•
THREAD CLASS: 3B
•
THREAD SERIES DESIGNATOR: UNF
•
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OUTSIDE DIAMETER SURFACE OF BODY
•
STYLE DESIGNATOR: BALL TYPE
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION
•
MATERIAL: STEEL COMP 410 INTERNAL ROD END BODY
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3B
THREAD SERIES DESIGNATORUNF
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OUTSIDE DIAMETER SURFACE OF BODY
STYLE DESIGNATORBALL TYPE
HARDNESS RATING60.0 ROCKWELL C MINIMUM AND 63.0 ROCKWELL C MAXIMUM INNER MEMBER
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION
MATERIALSTEEL COMP 410 INTERNAL ROD END BODY
MATERIALGREASE LUBRICATION
SURFACE TREATMENTNICKEL AND CHROMIUM INNER MEMBER
THREAD DIAMETER0.312 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
11-4GInterchangeable
interchangeable cross-reference
interchangeable
R4-11Interchangeable
interchangeable cross-reference
interchangeable
11-4KInterchangeable
interchangeable cross-reference
interchangeable
MDL89691-2Interchangeable
interchangeable cross-reference
interchangeable
6781488Interchangeable
interchangeable cross-reference
interchangeable
F-4CRADInterchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy R4-11MILG3278?
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 R4-11MILG3278?
R4-11MILG3278 is a BEARING,PLAIN,ROD END.
What parts can replace R4-11MILG3278?
There are 6 known substitutes for R4-11MILG3278: 11-4G, R4-11, 11-4K and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R4-11MILG3278?
R4-11MILG3278 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-512-5165. 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 — R4-11MILG3278

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