PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A-A-52420-21Plug,expansion

Federal Specifications Promulgated by General Services Administration Washington DC · NSN 5340-00-531-7275 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-00-531-7275 — this item is cataloged by the U.S. Government under National Stock Number 5340-00-531-7275. Primary manufacturer part number: A-A-52420-21.
Features
  • Plug,expansion — FSC 5340
  • Outside Diameter: 3.500 INCHES NOMINAL IN
  • Material Thickness: 0.134 INCHES NOMINAL IN
  • Material: STEEL
  • Radius: 6.000 INCHES NOMINAL IN
  • Style Designator: CONCAVE
  • Material Document and Classification: QQ-S-633, COMP FS1010-CANCELLED FED SPEC SINGLE MATERIAL RESPONSE
  • 7 verified cross-references
Applications
  • Applications requiring Steel construction
General Description

The Plug,expansion, cataloged under National Stock Number 5340-00-531-7275, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Federal Specifications Promulgated by General Services Administration Washington DC. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5340-00-531-7275
Primary Part NumberA-A-52420-21
Item NamePlug,expansion
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerFederal Specifications Promulgated by General Services Administration Washington DC
StatusACTIVE
Outside Diameter3.500 INCHES NOMINAL IN
Material Thickness0.134 INCHES NOMINAL IN
MaterialSTEEL
Radius6.000 INCHES NOMINAL IN
Style DesignatorCONCAVE
Material Document and ClassificationQQ-S-633, COMP FS1010-CANCELLED FED SPEC SINGLE MATERIAL RESPONSE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 12
5340-00-050-1575 INTERCHANGEABLE
Plug,expansion
5340-00-050-1593 INTERCHANGEABLE
Plug,expansion
5340-00-050-1600 INTERCHANGEABLE
Plug,expansion
5340-00-054-1412 INTERCHANGEABLE
Plug,expansion
5340-00-054-1414 INTERCHANGEABLE
Plug,expansion
5340-00-054-1416 INTERCHANGEABLE
Plug,expansion
5340-00-054-1418 INTERCHANGEABLE
Plug,expansion
5340-00-276-5853 INTERCHANGEABLE
Plug,expansion
5340-00-836-0647 INTERCHANGEABLE
Plug,expansion
5330-00-853-6891 INTERCHANGEABLE
Gasket
Cross-Reference Index
Part NumberManufacturer
A-A-52420-21 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
186984 General Motors Corp (USA)
541538 Army Weapons Command Attn Amswe-Ree-S (USA)
MS35648-21 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
A52420-21 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
A-A-52420 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
4251865 Agco Corp Parts Opn (USA)
Related Parts
5340-00-050-1575INTERCHANGEABLE
PLUG,EXPANSION
5340-00-050-1593INTERCHANGEABLE
PLUG,EXPANSION
5340-00-050-1600INTERCHANGEABLE
PLUG,EXPANSION
5340-00-054-1412INTERCHANGEABLE
PLUG,EXPANSION
5340-00-054-1414INTERCHANGEABLE
PLUG,EXPANSION
5340-00-054-1416INTERCHANGEABLE
PLUG,EXPANSION
5340-00-054-1418INTERCHANGEABLE
PLUG,EXPANSION
5340-00-276-5853INTERCHANGEABLE
PLUG,EXPANSION
5340-00-836-0647INTERCHANGEABLE
PLUG,EXPANSION
5330-00-853-6891INTERCHANGEABLE
GASKET
5340-00-898-9829INTERCHANGEABLE
PLUG,EXPANSION
5340-00-934-0085INTERCHANGEABLE
PLUG,EXPANSION

Frequently Asked Questions

What is NSN 5340-00-531-7275?

NSN 5340-00-531-7275 is a Plug,expansion, manufactured by Federal Specifications Promulgated by General Services Administration Washington DC, classified under FSC 5340 (No Item Name Available). Status: active.

What are the part numbers for NSN 5340-00-531-7275?

NSN 5340-00-531-7275 has 7 cross-referenced part numbers: A-A-52420-21 (Federal Specifications Promulgated by General Services Administration Washington DC), 186984 (General Motors Corp), 541538 (Army Weapons Command Attn Amswe-Ree-S), MS35648-21 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), A52420-21 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC) and 2 more.

What NSN replaces 5340-00-531-7275?

There are 12 known substitutes for 5340-00-531-7275: 5340-00-050-1575, 5340-00-050-1593, 5340-00-050-1600 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A-A-52420-21?

Key specifications for A-A-52420-21: Outside Diameter: 3.500 INCHES NOMINAL IN; Material Thickness: 0.134 INCHES NOMINAL IN; Material: STEEL; Radius: 6.000 INCHES NOMINAL IN. 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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