PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40784Bearing,sleeve

Rps-Fl, Inc. Dba Rps Inc · NSN 3120-00-398-8159 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-398-8159 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-398-8159. Primary manufacturer part number: 40784.
Features
  • Bearing,sleeve — FSC 3120
  • Flange Outside Diameter: 5.0000 INCHES NOMINAL IN
  • Left Internal Flange Width: 0.5620 INCHES NOMINAL IN
  • Body Outside Diameter: 4.4960 INCHES MINIMUM AND 4.4980 INCHES MAXIMUM IN
  • Body Inside Diameter: 3.0310 INCHES NOMINAL IN
  • Right Internal Flange Hole Diameter: 4.0000 INCHES NOMINAL IN
  • Right Internal Flange Width: 0.8125 INCHES NOMINAL IN
  • Left Internal Flange Hole Diameter: 3.6250 INCHES NOMINAL IN
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Copper Alloy Overall construction
General Description

The Bearing,sleeve, cataloged under National Stock Number 3120-00-398-8159, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Rps-Fl, Inc. Dba Rps Inc. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3120-00-398-8159
Primary Part Number40784
Item NameBearing,sleeve
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerRps-Fl, Inc. Dba Rps Inc
StatusACTIVE
Flange Outside Diameter5.0000 INCHES NOMINAL IN
Left Internal Flange Width0.5620 INCHES NOMINAL IN
Body Outside Diameter4.4960 INCHES MINIMUM AND 4.4980 INCHES MAXIMUM IN
Body Inside Diameter3.0310 INCHES NOMINAL IN
Right Internal Flange Hole Diameter4.0000 INCHES NOMINAL IN
Right Internal Flange Width0.8125 INCHES NOMINAL IN
Left Internal Flange Hole Diameter3.6250 INCHES NOMINAL IN
Flange Width0.3680 INCHES MINIMUM AND 0.3710 INCHES MAXIMUM IN
Corner ShapeSQUARE INSIDE RIGHT CORNER
Corner ShapeSQUARE LEFT FLANGE BODY CORNER
MaterialCOPPER ALLOY OVERALL
Corner ShapeSQUARE OUTSIDE LEFT CORNER
Corner ShapeSQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
Corner ShapeCHAMFERED OUTSIDE RIGHT CORNER
Corner ShapeSQUARE INSIDE LEFT CORNER
Style DesignatorSOLID, EXTERNAL FLANGE ONE END, INTERNAL FLANGE AT BOTH ENDS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
4310-00-367-5140 INTERCHANGEABLE
Vacuum Pump,reciprocating
6675-00-373-389940-784 INTERCHANGEABLE
Worm Assembly
Warren Industries Inc Dba Warren Industries Inc Div Warren-Knight Instrument Co. and N. Amer. Survey Supply Co.
5950-00-404-21501097D INTERCHANGEABLE
Transformer,audio Frequency
A M I/ Coast Magnetics Inc. Dba Coast Magnetics
6550-00-890-1965 INTERCHANGEABLE
Antigen,proteus Ox K
5365-01-445-919951806 INTERCHANGEABLE
Spacer,ring
Tech Products Corp
Cross-Reference Index
Part NumberManufacturer
40784 Rps-Fl, Inc. Dba Rps Inc (USA)
256102-8 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
H256102-8 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
H256102-8 Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA)
SL6102PC113 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
9496P Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
SL6115PC113 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging (USA)
HM-40784 Hoffert Marine Inc (USA)
256102-8 Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA)
9496P Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA)
Related Parts
4310-00-367-5140INTERCHANGEABLE
VACUUM PUMP,RECIPROCATING
6675-00-373-3899INTERCHANGEABLE
WORM ASSEMBLY
40-784
5950-00-404-2150INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
1097D
6550-00-890-1965INTERCHANGEABLE
ANTIGEN,PROTEUS OX K
5365-01-445-9199INTERCHANGEABLE
SPACER,RING
51806

Frequently Asked Questions

What is NSN 3120-00-398-8159?

NSN 3120-00-398-8159 is a Bearing,sleeve, manufactured by Rps-Fl, Inc. Dba Rps Inc, classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-00-398-8159?

NSN 3120-00-398-8159 has 10 cross-referenced part numbers: 40784 (Rps-Fl, Inc. Dba Rps Inc), 256102-8 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging), H256102-8 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging), H256102-8 (Curtiss-Wright Electro-Mechanical Corporation Div Epd), SL6102PC113 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss Wright Engineered Pump Division Use CAGE Code 0ubg9 for Cataloging) and 5 more.

What NSN replaces 3120-00-398-8159?

There are 5 known substitutes for 3120-00-398-8159: 4310-00-367-5140, 6675-00-373-3899, 5950-00-404-2150 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40784?

Key specifications for 40784: Flange Outside Diameter: 5.0000 INCHES NOMINAL IN; Left Internal Flange Width: 0.5620 INCHES NOMINAL IN; Overall Length: 1.8750 INCHES NOMINAL IN; Body Outside Diameter: 4.4960 INCHES MINIMUM AND 4.4980 INCHES MAXIMUM IN. 17 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com