PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

640688-5Bushing,sleeve

Smith Meter Inc Parts Opn · NSN 3120-00-766-8161 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-766-8161 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-766-8161. Primary manufacturer part number: 640688-5.
Features
  • Bushing,sleeve — FSC 3120
  • Body Inside Diameter: 0.1720 INCHES NOMINAL IN
  • Corner Shape: SQUARE ALL CORNERS
  • Material: COPPER ALLOY OVERALL
  • Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES
  • Body Outside Diameter: 0.3120 INCHES NOMINAL IN
  • 3 verified cross-references
  • Primary manufacturer: Smith Meter Inc Parts Opn
Applications
  • Applications requiring Copper Alloy Overall construction
General Description

The Bushing,sleeve, cataloged under National Stock Number 3120-00-766-8161, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Smith Meter Inc Parts Opn. Government technical data includes 5 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3120-00-766-8161
Primary Part Number640688-5
Item NameBushing,sleeve
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerSmith Meter Inc Parts Opn
StatusACTIVE
Body Inside Diameter0.1720 INCHES NOMINAL IN
Corner ShapeSQUARE ALL CORNERS
MaterialCOPPER ALLOY OVERALL
Style DesignatorSOLID, PLAIN, NO OUTSIDE FLANGES
Body Outside Diameter0.3120 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5306-00-424-5399B35-3 INTERCHANGEABLE
Bolt,shoulder
Dresser Industries Inc Leroi Div
3120-00-540-7565B35-3 INTERCHANGEABLE
Bearing,sleeve
Altra Industrial Motion Corp.
5915-01-458-2178500022A-11 INTERCHANGEABLE
Filter Assembly,electrical
Vishay Hirel Systems Llc Div Duluth
Cross-Reference Index
Part NumberManufacturer
640688-5 A. O. Smith Corporation Dba a O Smith Corp (USA)
640688-5 PRIMARY Smith Meter Inc Parts Opn (USA)
B35-3 A. O. Smith Corporation Dba a O Smith Corp (USA)
Related Parts
5306-00-424-5399INTERCHANGEABLE
BOLT,SHOULDER
B35-3
3120-00-540-7565INTERCHANGEABLE
BEARING,SLEEVE
B35-3
5915-01-458-2178INTERCHANGEABLE
FILTER ASSEMBLY,ELECTRICAL
500022A-11

Frequently Asked Questions

What is NSN 3120-00-766-8161?

NSN 3120-00-766-8161 is a Bushing,sleeve, manufactured by Smith Meter Inc Parts Opn, classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-00-766-8161?

NSN 3120-00-766-8161 has 3 cross-referenced part numbers: 640688-5 (A. O. Smith Corporation Dba a O Smith Corp), 640688-5 (Smith Meter Inc Parts Opn), B35-3 (A. O. Smith Corporation Dba a O Smith Corp).

What NSN replaces 3120-00-766-8161?

There are 3 known substitutes for 3120-00-766-8161: 5306-00-424-5399, 3120-00-540-7565, 5915-01-458-2178. Verify interchangeability with system specifications before substitution.

What are the specifications of 640688-5?

Key specifications for 640688-5: Body Inside Diameter: 0.1720 INCHES NOMINAL IN; Corner Shape: SQUARE ALL CORNERS; Material: COPPER ALLOY OVERALL; Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES. 6 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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