PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B57-2Bearing,sleeve

Altra Industrial Motion Corp. · NSN 3120-00-585-5605 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-585-5605 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-585-5605. Primary manufacturer part number: B57-2.
Features
  • Bearing,sleeve — FSC 3120
  • Nondefinitive Spec/std Data: 1 TYPE AND A COMPOSITION
  • Corner Shape: SQUARE ALL CORNERS
  • Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES
  • Material Document and Classification: MIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Material: COPPER ALLOY OVERALL
  • Body Inside Diameter: 0.3130 INCHES MINIMUM AND 0.3140 INCHES MAXIMUM IN
  • Body Outside Diameter: 0.4380 INCHES MINIMUM AND 0.4390 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 3120-00-585-5605, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Altra Industrial Motion Corp.. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3120-00-585-5605
Primary Part NumberB57-2
Item NameBearing,sleeve
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerAltra Industrial Motion Corp.
StatusACTIVE
Nondefinitive Spec/std Data1 TYPE AND A COMPOSITION
Corner ShapeSQUARE ALL CORNERS
Style DesignatorSOLID, PLAIN, NO OUTSIDE FLANGES
Material Document and ClassificationMIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MaterialCOPPER ALLOY OVERALL
Body Inside Diameter0.3130 INCHES MINIMUM AND 0.3140 INCHES MAXIMUM IN
Body Outside Diameter0.4380 INCHES MINIMUM AND 0.4390 INCHES MAXIMUM IN
MaterialOIL LUBRICATING LUBRICATION
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5935-00-615-760882-5384 INTERCHANGEABLE
Connector,receptacle,electrical
Amphenol Corporation Div Amphenol Rf
5945-01-481-1583RY2S-U-DC24V INTERCHANGEABLE
Relay,electromagnetic
Idec Systems and Controls Corp
Cross-Reference Index
Part NumberManufacturer
C313E-0250 Bound Brook Bearing Co (USA)
B57-2 PRIMARY Altra Industrial Motion Corp. (USA)
BACB10D24 The Boeing Company Div Defense (USA)
MILB5687 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
3056530P1 Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems (USA)
P-891-16 U.s. Graphite Corporation (USA)
34598-B57-2 Altra Industrial Motion Corp. (USA)
34598 Altra Industrial Motion Corp. (USA)
Related Parts
5935-00-615-7608INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
82-5384
5945-01-481-1583INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
RY2S-U-DC24V

Frequently Asked Questions

What is NSN 3120-00-585-5605?

NSN 3120-00-585-5605 is a Bearing,sleeve, manufactured by Altra Industrial Motion Corp., classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-00-585-5605?

NSN 3120-00-585-5605 has 8 cross-referenced part numbers: C313E-0250 (Bound Brook Bearing Co), B57-2 (Altra Industrial Motion Corp.), BACB10D24 (The Boeing Company Div Defense), MILB5687 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 3056530P1 (Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems) and 3 more.

What NSN replaces 3120-00-585-5605?

There are 2 known substitutes for 3120-00-585-5605: 5935-00-615-7608, 5945-01-481-1583. Verify interchangeability with system specifications before substitution.

What are the specifications of B57-2?

Key specifications for B57-2: Nondefinitive Spec/std Data: 1 TYPE AND A COMPOSITION; Corner Shape: SQUARE ALL CORNERS; Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES; Material Document and Classification: MIL-B-5697,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 9 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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