PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MR4-0MILG3278ABearing,roller,rod End

Rexnord Industries, Llc Div Aerosspace Bearing Operation · NSN 3110-00-227-3295 · FSC 3110 · No Item Name Available
Verified by PartsTable
NSN 3110-00-227-3295 — this item is cataloged by the U.S. Government under National Stock Number 3110-00-227-3295. Primary manufacturer part number: MR4-0MILG3278A.
Features
  • Bearing,roller,rod End — FSC 3110
  • Shank Diameter: 0.3750 INCHES NOMINAL IN
  • Thread Direction: RIGHT-HAND
  • Thread Class: 3A A
  • Self-Alignment Location: INTERNAL
  • Alignment Type: SELF-ALIGNING
  • Lubrication Material: GREASE
  • Self-Alignment Angle: 10.00 DEGREES NOMINAL
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Steel Inner Ring construction
General Description

The Bearing,roller,rod End, cataloged under National Stock Number 3110-00-227-3295, is classified within Federal Supply Class 3110 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Rexnord Industries, Llc Div Aerosspace Bearing Operation. Government technical data includes 27 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3110-00-227-3295
Primary Part NumberMR4-0MILG3278A
Item NameBearing,roller,rod End
FSC / FSG3110 / 31 — No Item Name Available
ManufacturerRexnord Industries, Llc Div Aerosspace Bearing Operation
StatusACTIVE
Shank Diameter0.3750 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND
Thread Class3A A
Self-Alignment LocationINTERNAL
Alignment TypeSELF-ALIGNING
Lubrication MaterialGREASE
Self-Alignment Angle10.00 DEGREES NOMINAL
Inner Ring Width0.5000 INCHES NOMINAL IN
Shank Thread Length1.0620 INCHES NOMINAL IN
Outer Ring Width0.3580 INCHES NOMINAL IN
Length From Bore Center to Shank End1.8125 INCHES NOMINAL IN
Thread Quantity Per Inch24
Shield Quantity2
Nominal Thread Size0.375 INCHES IN
MaterialSTEEL INNER RING
Bore Diameter0.2500 INCHES NOMINAL IN
Shank StyleEXTERNALLY THREADED
Surface TreatmentCADMIUM SHIELD
Style DesignatorSINGLE ROW, CONCAVE ROLLERS
Overall Outside Diameter1.0780 INCHES NOMINAL IN
Thread Series DesignatorUNIFIED NATIONAL JOINT FINE (UNJF)
Surface TreatmentCADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES
MaterialSTEEL CORROSION RESISTING AND STEEL SHIELD
MaterialSTEEL SHAFT
MaterialSTEEL OUTER RING
Lubrication Material Document and ClassificationMIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE
MaterialSTEEL ROLLER
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
3110-00-227-3257HJ405228 INTERCHANGEABLE
Bearing,roller,needle
Timken Aerospace, Inc Dba Torrington Product
5961-00-347-9399CK949 INTERCHANGEABLE
Semiconductor Device,diode
Raytheon Company Dba Raytheon Co
5820-01-621-2389MR-40 INTERCHANGEABLE
Receiver Subassembly,radio
Poly-Planar Inc
Cross-Reference Index
Part NumberManufacturer
MR4-0MILG3278A PRIMARY Rexnord Industries, Llc Div Aerosspace Bearing Operation (USA)
MR4-0 PRIMARY Rexnord Industries, Llc Div Aerosspace Bearing Operation (USA)
Related Parts
3110-00-227-3257INTERCHANGEABLE
BEARING,ROLLER,NEEDLE
HJ405228
5961-00-347-9399INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
CK949
5820-01-621-2389INTERCHANGEABLE
RECEIVER SUBASSEMBLY,RADIO
MR-40

Frequently Asked Questions

What is NSN 3110-00-227-3295?

NSN 3110-00-227-3295 is a Bearing,roller,rod End, manufactured by Rexnord Industries, Llc Div Aerosspace Bearing Operation, classified under FSC 3110 (No Item Name Available). Status: active.

What are the part numbers for NSN 3110-00-227-3295?

NSN 3110-00-227-3295 has 2 cross-referenced part numbers: MR4-0MILG3278A (Rexnord Industries, Llc Div Aerosspace Bearing Operation), MR4-0 (Rexnord Industries, Llc Div Aerosspace Bearing Operation).

What NSN replaces 3110-00-227-3295?

There are 3 known substitutes for 3110-00-227-3295: 3110-00-227-3257, 5961-00-347-9399, 5820-01-621-2389. Verify interchangeability with system specifications before substitution.

What are the specifications of MR4-0MILG3278A?

Key specifications for MR4-0MILG3278A: Shank Diameter: 0.3750 INCHES NOMINAL IN; Thread Direction: RIGHT-HAND; Thread Class: 3A A; Special Features: LUBRICATION FITTING LOCATED OPPOSITE THE THREADED SHANK. 29 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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