PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A51B51540-57Bushing,sleeve

Dla Aviation Engineering Div Department of Defense · NSN 3120-00-003-3865 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-003-3865 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-003-3865. Primary manufacturer part number: A51B51540-57.
Features
  • Bushing,sleeve — FSC 3120
  • Body Inside Diameter: 0.2497 INCHES MINIMUM AND 0.2517 INCHES MAXIMUM IN
  • Surface Treatment: CADMIUM OVERALL
  • Corner Shape: SQUARE ALL CORNERS
  • Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES
  • Material: STEEL OVERALL
  • Body Outside Diameter: 0.3727 INCHES MINIMUM AND 0.3737 INCHES MAXIMUM IN
  • Material Document and Classification: GS30C,FSCM 26512 MFR REF SINGLE MATERIAL RESPONSE OVERALL
Applications
  • Applications requiring Steel Overall construction
General Description

The Bushing,sleeve, cataloged under National Stock Number 3120-00-003-3865, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Dla Aviation Engineering Div Department of Defense. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3120-00-003-3865
Primary Part NumberA51B51540-57
Item NameBushing,sleeve
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerDla Aviation Engineering Div Department of Defense
StatusACTIVE
Body Inside Diameter0.2497 INCHES MINIMUM AND 0.2517 INCHES MAXIMUM IN
Surface TreatmentCADMIUM OVERALL
Corner ShapeSQUARE ALL CORNERS
Style DesignatorSOLID, PLAIN, NO OUTSIDE FLANGES
MaterialSTEEL OVERALL
Body Outside Diameter0.3727 INCHES MINIMUM AND 0.3737 INCHES MAXIMUM IN
Material Document and ClassificationGS30C,FSCM 26512 MFR REF SINGLE MATERIAL RESPONSE OVERALL
Surface Treatment Document and ClassificationQQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Test Data Document81349-MIL-I-6868 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
2935-00-421-45361128HM40095-1 INTERCHANGEABLE
Cap,filler Opening
Northrop Grumman Systems Corporation
Cross-Reference Index
Part NumberManufacturer
PLA51B51540 Northrop Grumman Systems Corporation (USA)
GSS4710 Northrop Grumman Systems Corporation (USA)
A51B51540-57 PRIMARY Dla Aviation Engineering Div Department of Defense (USA)
A51B51540-57 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems (USA)
A51B51540-57 Northrop Grumman Systems Corporation (USA)
3120-A117-02029 Dla Aviation Engineering Div Department of Defense (USA)
A51B51540-57 Northrop Grumman Systems Corporation (USA)
Related Parts
2935-00-421-4536INTERCHANGEABLE
CAP,FILLER OPENING
1128HM40095-1

Frequently Asked Questions

What is NSN 3120-00-003-3865?

NSN 3120-00-003-3865 is a Bushing,sleeve, manufactured by Dla Aviation Engineering Div Department of Defense, classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-00-003-3865?

NSN 3120-00-003-3865 has 7 cross-referenced part numbers: PLA51B51540 (Northrop Grumman Systems Corporation), GSS4710 (Northrop Grumman Systems Corporation), A51B51540-57 (Dla Aviation Engineering Div Department of Defense), A51B51540-57 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems), A51B51540-57 (Northrop Grumman Systems Corporation) and 2 more.

What NSN replaces 3120-00-003-3865?

There is 1 known substitute for 3120-00-003-3865: 2935-00-421-4536. Verify interchangeability with system specifications before substitution.

What are the specifications of A51B51540-57?

Key specifications for A51B51540-57: Overall Length: 0.8400 INCHES NOMINAL IN; Body Inside Diameter: 0.2497 INCHES MINIMUM AND 0.2517 INCHES MAXIMUM IN; Surface Treatment: CADMIUM OVERALL; 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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