PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1663-1Bearing,washer,thrust

Eaton Aerospace, Llc Dba Jackson South · NSN 3120-00-656-7260 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-656-7260 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-656-7260. Primary manufacturer part number: 1663-1.
Features
  • Bearing,washer,thrust — FSC 3120
  • Washer Keyway Depth: 0.0150 INCHES NOMINAL IN
  • Surface Condition: GROUND
  • Style Designator: ROUND W/KEYWAYS
  • Material: STEEL COMP 1040 OR STEEL COMP 1045 OR STEEL COMP 1050 OVERALL
  • Corner Shape: SQUARE ALL CORNERS
  • Hardness Rating: 68.0 ROCKWELL A MINIMUM AND 70.0 ROCKWELL A MAXIMUM OVERALL
  • Material Document and Classification: AISI ASSN STD ALL MATERIAL RESPONSES OVERALL
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Structural fastening and assembly
  • Equipment mounting
General Description

The Bearing,washer,thrust, cataloged under National Stock Number 3120-00-656-7260, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Eaton Aerospace, Llc Dba Jackson South. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN3120-00-656-7260
Primary Part Number1663-1
Item NameBearing,washer,thrust
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerEaton Aerospace, Llc Dba Jackson South
StatusCANCELLED
Washer Keyway Depth0.0150 INCHES NOMINAL IN
Surface ConditionGROUND
Style DesignatorROUND W/KEYWAYS
MaterialSTEEL COMP 1040 OR STEEL COMP 1045 OR STEEL COMP 1050 OVERALL
Corner ShapeSQUARE ALL CORNERS
Hardness Rating68.0 ROCKWELL A MINIMUM AND 70.0 ROCKWELL A MAXIMUM OVERALL
Material Document and ClassificationAISI ASSN STD ALL MATERIAL RESPONSES OVERALL
Center Hole Shape StyleROUND
Keyway Quantity1
Cross-Sectional Shape StyleRECTANGULAR
Keyway Radius0.0930 INCHES NOMINAL IN
Diameter0.5050 INCHES NOMINAL IN
Outside Diameter0.6250 INCHES NOMINAL IN
Overall Thickness0.0290 INCHES MINIMUM AND 0.0310 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 11
4140-00-024-55551663-1 INTERCHANGEABLE
Impeller,fan,axial
Ashland Electric Products Inc
5330-00-355-2559A587X3 INTERCHANGEABLE
Ring,wiper
David Brown Hydraulics Inc Dba Hydreco
5330-00-383-6096 INTERCHANGEABLE
Gasket Set
5330-00-424-545616-631 INTERCHANGEABLE
Gasket
Dresser Industries Inc Leroi Div
5915-00-919-4551SM-B-544657 INTERCHANGEABLE
Filter,radio Frequency Interfere
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5306-01-194-4961250-16514 PC 18 INTERCHANGEABLE
Bolt,machine
Moog Inc. Dba Ampac-Isp Corp
5995-01-242-6504506-836-04 INTERCHANGEABLE
Cable Assembly,power,electrical
Nortech Systems Inc Dba Aerospace Systems Div Nortech Systems - Aerospace Systems Division
4320-01-289-7999 INTERCHANGEABLE
Rotor,pump
5950-01-480-211016631 INTERCHANGEABLE
Coil,electrical
Standex Electronics, Inc.
5365-01-548-4405DPS-4 INTERCHANGEABLE
Spacer Shamban
Ordnance Technology Service, Inc.
Cross-Reference Index
Part NumberManufacturer
1663-1 General Signal Corp (USA)
1663-1 Eaton Aerospace, Llc Dba Jackson South (USA)
1663-1 PRIMARY Eaton Aerospace, Llc Dba Jackson South (USA)
Related Parts
4140-00-024-5555INTERCHANGEABLE
IMPELLER,FAN,AXIAL
1663-1
5330-00-355-2559INTERCHANGEABLE
RING,WIPER
A587X3
5330-00-383-6096INTERCHANGEABLE
GASKET SET
5330-00-424-5456INTERCHANGEABLE
GASKET
16-631
5915-00-919-4551INTERCHANGEABLE
FILTER,RADIO FREQUENCY INTERFERE
SM-B-544657
5306-01-194-4961INTERCHANGEABLE
BOLT,MACHINE
250-16514 PC 18
5995-01-242-6504INTERCHANGEABLE
CABLE ASSEMBLY,POWER,ELECTRICAL
506-836-04
4320-01-289-7999INTERCHANGEABLE
ROTOR,PUMP
5950-01-480-2110INTERCHANGEABLE
COIL,ELECTRICAL
16631
5365-01-548-4405INTERCHANGEABLE
SPACER SHAMBAN
DPS-4
6515-01-584-1209INTERCHANGEABLE
PLATE SET,BONE,COMPRESSION
105.272

Frequently Asked Questions

What is NSN 3120-00-656-7260?

NSN 3120-00-656-7260 is a Bearing,washer,thrust, manufactured by Eaton Aerospace, Llc Dba Jackson South, classified under FSC 3120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 3120-00-656-7260?

NSN 3120-00-656-7260 has 3 cross-referenced part numbers: 1663-1 (General Signal Corp), 1663-1 (Eaton Aerospace, Llc Dba Jackson South), 1663-1 (Eaton Aerospace, Llc Dba Jackson South).

What NSN replaces 3120-00-656-7260?

There are 11 known substitutes for 3120-00-656-7260: 4140-00-024-5555, 5330-00-355-2559, 5330-00-383-6096 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1663-1?

Key specifications for 1663-1: Washer Keyway Depth: 0.0150 INCHES NOMINAL IN; Surface Condition: GROUND; Style Designator: ROUND W/KEYWAYS; Material: STEEL COMP 1040 OR STEEL COMP 1045 OR STEEL COMP 1050 OVERALL. 14 total characteristics are documented in the Federal Logistics Information System.

Is NSN 3120-00-656-7260 still in active supply?

NSN 3120-00-656-7260 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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