PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ML21ABearing,sleeve

Marine Engine Specialties Div of Mesco Tectonics Inc · NSN 3120-00-367-3585 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-367-3585 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-367-3585. Primary manufacturer part number: ML21A.
Features
  • Bearing,sleeve — FSC 3120
  • Body Inside Diameter: 0.8760 INCHES MINIMUM AND 0.8770 INCHES MAXIMUM IN
  • Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES
  • Hardness Rating: 30.0 ROCKWELL H MINIMUM AND 70.0 ROCKWELL H MAXIMUM OVERALL
  • Material: OIL LUBRICATING LUBRICATION
  • Material Document and Classification: MIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Material: COPPER ALLOY OVERALL
  • Body Outside Diameter: 1.0030 INCHES MINIMUM AND 1.0040 INCHES MAXIMUM IN
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Oil Lubricating Lubrication construction
General Description

The Bearing,sleeve, cataloged under National Stock Number 3120-00-367-3585, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Marine Engine Specialties Div of Mesco Tectonics Inc. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference 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
NSN3120-00-367-3585
Primary Part NumberML21A
Item NameBearing,sleeve
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerMarine Engine Specialties Div of Mesco Tectonics Inc
StatusACTIVE
Body Inside Diameter0.8760 INCHES MINIMUM AND 0.8770 INCHES MAXIMUM IN
Style DesignatorSOLID, PLAIN, NO OUTSIDE FLANGES
Hardness Rating30.0 ROCKWELL H MINIMUM AND 70.0 ROCKWELL H MAXIMUM OVERALL
MaterialOIL LUBRICATING LUBRICATION
Material Document and ClassificationMIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MaterialCOPPER ALLOY OVERALL
Body Outside Diameter1.0030 INCHES MINIMUM AND 1.0040 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
3120-00-293-5488ML21A INTERCHANGEABLE
Bearing,sleeve
Prestolite Electric Inc
3120-00-425-6467MS17795-128 INTERCHANGEABLE
Bearing,sleeve
American Society for Testing and Materials Dba Astm International
5962-00-938-9315 INTERCHANGEABLE
Microcircuit,digital
Cross-Reference Index
Part NumberManufacturer
ML21A Marine Engine Specialties Div of Mesco Tectonics Inc (USA)
Related Parts
3120-00-293-5488INTERCHANGEABLE
BEARING,SLEEVE
ML21A
3120-00-425-6467INTERCHANGEABLE
BEARING,SLEEVE
MS17795-128
5962-00-938-9315INTERCHANGEABLE
MICROCIRCUIT,DIGITAL

Frequently Asked Questions

What is NSN 3120-00-367-3585?

NSN 3120-00-367-3585 is a Bearing,sleeve, manufactured by Marine Engine Specialties Div of Mesco Tectonics Inc, classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-00-367-3585?

NSN 3120-00-367-3585 has 1 cross-referenced part number: ML21A (Marine Engine Specialties Div of Mesco Tectonics Inc).

What NSN replaces 3120-00-367-3585?

There are 3 known substitutes for 3120-00-367-3585: 3120-00-293-5488, 3120-00-425-6467, 5962-00-938-9315. Verify interchangeability with system specifications before substitution.

What are the specifications of ML21A?

Key specifications for ML21A: Body Inside Diameter: 0.8760 INCHES MINIMUM AND 0.8770 INCHES MAXIMUM IN; Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES; Hardness Rating: 30.0 ROCKWELL H MINIMUM AND 70.0 ROCKWELL H MAXIMUM OVERALL; Material: OIL LUBRICATING LUBRICATION. 8 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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