PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18123Bearing,sleeve

Master Machine Products Corp · NSN 3120-00-661-4982 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-661-4982 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-661-4982. Primary manufacturer part number: 18123.
Features
  • Bearing,sleeve — FSC 3120
  • Nondefinitive Spec/std Data: 1 TYPE AND A COMPOSITION
  • Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES
  • Material Document and Classification: MIL-L-11734 MIL SPEC SINGLE MATERIAL RESPONSE AND MIL-L-6085 MIL SPEC SINGLE MATERIAL RESPONSE AND MIL-L-15016, SYMBOL 2190 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION
  • Corner Shape: SQUARE ALL CORNERS
  • Material: COPPER ALLOY OVERALL
  • Material Document and Classification: MIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Body Outside Diameter: 0.6270 INCHES MINIMUM AND 0.6280 INCHES MAXIMUM 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 3120-00-661-4982, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Master Machine Products Corp. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3120-00-661-4982
Primary Part Number18123
Item NameBearing,sleeve
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerMaster Machine Products Corp
StatusACTIVE
Nondefinitive Spec/std Data1 TYPE AND A COMPOSITION
Style DesignatorSOLID, PLAIN, NO OUTSIDE FLANGES
Material Document and ClassificationMIL-L-11734 MIL SPEC SINGLE MATERIAL RESPONSE AND MIL-L-6085 MIL SPEC SINGLE MATERIAL RESPONSE AND MIL-L-15016, SYMBOL 2190 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION
Corner ShapeSQUARE ALL CORNERS
MaterialCOPPER ALLOY OVERALL
Material Document and ClassificationMIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Body Outside Diameter0.6270 INCHES MINIMUM AND 0.6280 INCHES MAXIMUM IN
Body Inside Diameter0.5090 INCHES MINIMUM AND 0.5100 INCHES MAXIMUM IN
MaterialOIL LUBRICATING LUBRICATION
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
4820-00-036-1711005.102.0040 INTERCHANGEABLE
Disk,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
6810-00-106-1005 INTERCHANGEABLE
Ammonium Hydroxide
4320-00-139-3981A669 INTERCHANGEABLE
Impeller,pump,centrifugal
Circor Naval Solutions Llc Dba Warren Pumps
3110-00-156-357610879 INTERCHANGEABLE
Bearing,ball,annular
Uniontools Inc
5310-00-250-206218123 INTERCHANGEABLE
Washer,flat
Arvinmeritor Inc
5360-00-312-6204A669 INTERCHANGEABLE
Spring,helical,compression
Crane Co Div Valve Div
5925-01-031-991118123 INTERCHANGEABLE
Circuit Breaker
Drs Advanced Isr, Llc
6240-01-480-21751G4023 INTERCHANGEABLE
Lamp,fluorescent
Technical Consumer Products, Inc.
5999-01-496-647518-123 INTERCHANGEABLE
Contact,electrical
Power Connector Llc
Cross-Reference Index
Part NumberManufacturer
18123 Master Machine Products Corp (USA)
A669 Chrysler Realty Company Llc Dba Daimler Chrysler (USA)
MILB5687TYPE1C0MP0SITI0NA Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
A669 Chrysler Corp Amplex Div (USA)
Related Parts
4820-00-036-1711INTERCHANGEABLE
DISK,VALVE
005.102.0040
6810-00-106-1005INTERCHANGEABLE
AMMONIUM HYDROXIDE
4320-00-139-3981INTERCHANGEABLE
IMPELLER,PUMP,CENTRIFUGAL
A669
3110-00-156-3576INTERCHANGEABLE
BEARING,BALL,ANNULAR
10879
5310-00-250-2062INTERCHANGEABLE
WASHER,FLAT
18123
5360-00-312-6204INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
A669
5925-01-031-9911INTERCHANGEABLE
CIRCUIT BREAKER
18123
6240-01-480-2175INTERCHANGEABLE
LAMP,FLUORESCENT
1G4023
5999-01-496-6475INTERCHANGEABLE
CONTACT,ELECTRICAL
18-123

Frequently Asked Questions

What is NSN 3120-00-661-4982?

NSN 3120-00-661-4982 is a Bearing,sleeve, manufactured by Master Machine Products Corp, classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-00-661-4982?

NSN 3120-00-661-4982 has 4 cross-referenced part numbers: 18123 (Master Machine Products Corp), A669 (Chrysler Realty Company Llc Dba Daimler Chrysler), MILB5687TYPE1C0MP0SITI0NA (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), A669 (Chrysler Corp Amplex Div).

What NSN replaces 3120-00-661-4982?

There are 9 known substitutes for 3120-00-661-4982: 4820-00-036-1711, 6810-00-106-1005, 4320-00-139-3981 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 18123?

Key specifications for 18123: Nondefinitive Spec/std Data: 1 TYPE AND A COMPOSITION; Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES; Material Document and Classification: MIL-L-11734 MIL SPEC SINGLE MATERIAL RESPONSE AND MIL-L-6085 MIL SPEC SINGLE MATERIAL RESPONSE AND MIL-L-15016, SYMBOL 2190 MIL SPEC SINGLE MATERIAL RESPONSE LUBRICATION; Corner Shape: SQUARE ALL CORNERS. 10 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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