PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ASTM B221Angle,structural

American Society for Testing and Materials Dba Astm International · NSN 9540-00-145-4521 · FSC 9540 · No Item Name Available
Verified by PartsTable
NSN 9540-00-145-4521 — this item is cataloged by the U.S. Government under National Stock Number 9540-00-145-4521. Primary manufacturer part number: ASTM B221.
Features
  • Angle,structural — FSC 9540
  • Material Document and Classification: AMS-Q-A-200/11 FED SPEC SINGLE MATERIAL RESPONSE
  • First Tip Radius: 0.062 INCHES NOMINAL IN
  • Left Side Flange Thickness: 0.062 INCHES NOMINAL IN
  • Nondefinitive Spec/std Data: 7075 ALLOY AND ANNEALED CONDITION
  • Second Tip Radius: 0.062 INCHES NOMINAL IN
  • Fillet Radius Where Left Flange Joins Base Flange: 0.125 INCHES NOMINAL IN
  • Second Tip Style: UPPER RADIUS
Applications
  • Applications requiring Aluminum Alloy 7075 construction
General Description

The Angle,structural, cataloged under National Stock Number 9540-00-145-4521, is classified within Federal Supply Class 9540 (No Item Name Available) of the Metal Bars, Sheets, and Shapes group. The primary manufacturer of record is American Society for Testing and Materials Dba Astm International. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN9540-00-145-4521
Primary Part NumberASTM B221
Item NameAngle,structural
FSC / FSG9540 / 95 — No Item Name Available
ManufacturerAmerican Society for Testing and Materials Dba Astm International
StatusACTIVE
Material Document and ClassificationAMS-Q-A-200/11 FED SPEC SINGLE MATERIAL RESPONSE
First Tip Radius0.062 INCHES NOMINAL IN
Left Side Flange Thickness0.062 INCHES NOMINAL IN
Nondefinitive Spec/std Data7075 ALLOY AND ANNEALED CONDITION
Second Tip Radius0.062 INCHES NOMINAL IN
Fillet Radius Where Left Flange Joins Base Flange0.125 INCHES NOMINAL IN
Second Tip StyleUPPER RADIUS
Second Tip Relationship to First TipNOT IDENTICAL
First Tip StyleRIGHT QUARTER RADIUS
Left Inside Angle90.0 DEGREES NOMINAL
Base Flange Thickness0.062 INCHES NOMINAL IN
Heat TreatmentO-ANNEALED
Length10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT
Weight Per Unit Measure0.140 POUNDS PER LINEAR FOOT LBS
Basic Shape StyleANGLE
MaterialALUMINUM ALLOY 7075
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
9540-00-009-0594 INTERCHANGEABLE
Angle,structural
9540-00-146-0730 INTERCHANGEABLE
Angle,structural
9540-01-071-3502 INTERCHANGEABLE
Angle,structural
9540-01-071-6522 INTERCHANGEABLE
Angle,structural
9540-01-164-7575 INTERCHANGEABLE
Angle,structural
9540-01-164-7576 INTERCHANGEABLE
Angle,structural
9540-01-302-6048 INTERCHANGEABLE
Angle,structural
9540-01-367-1987 INTERCHANGEABLE
Angle,structural
Cross-Reference Index
Part NumberManufacturer
ASTM B221 American Society for Testing and Materials Dba Astm International (USA)
AND10134-1005 Airforce-Navy Aeronautical Design Standard
AMS-QQ-A-200/11 Sae International Dba Sae International (USA)
QQ-A-200/11 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
AMS-QQ-A-200/11 Society of Automotive Engineers Inc (USA)
AND10134-1005/QQ-A-200/11-0 Defense Logistics Agency Dba Defense Supply Center Philadelphia (USA)
LS10134-1005-6 Lockheed Martin Corp (USA)
Related Parts
9540-00-009-0594INTERCHANGEABLE
ANGLE,STRUCTURAL
9540-00-146-0730INTERCHANGEABLE
ANGLE,STRUCTURAL
9540-01-071-3502INTERCHANGEABLE
ANGLE,STRUCTURAL
9540-01-071-6522INTERCHANGEABLE
ANGLE,STRUCTURAL
9540-01-164-7575INTERCHANGEABLE
ANGLE,STRUCTURAL
9540-01-164-7576INTERCHANGEABLE
ANGLE,STRUCTURAL
9540-01-302-6048INTERCHANGEABLE
ANGLE,STRUCTURAL
9540-01-367-1987INTERCHANGEABLE
ANGLE,STRUCTURAL

Frequently Asked Questions

What is NSN 9540-00-145-4521?

NSN 9540-00-145-4521 is a Angle,structural, manufactured by American Society for Testing and Materials Dba Astm International, classified under FSC 9540 (No Item Name Available). Status: active.

What are the part numbers for NSN 9540-00-145-4521?

NSN 9540-00-145-4521 has 7 cross-referenced part numbers: ASTM B221 (American Society for Testing and Materials Dba Astm International), AND10134-1005 (Airforce-Navy Aeronautical Design Standard), AMS-QQ-A-200/11 (Sae International Dba Sae International), QQ-A-200/11 (Federal Specifications Promulgated by General Services Administration Washington DC), AMS-QQ-A-200/11 (Society of Automotive Engineers Inc) and 2 more.

What NSN replaces 9540-00-145-4521?

There are 8 known substitutes for 9540-00-145-4521: 9540-00-009-0594, 9540-00-146-0730, 9540-01-071-3502 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of ASTM B221?

Key specifications for ASTM B221: Material Document and Classification: AMS-Q-A-200/11 FED SPEC SINGLE MATERIAL RESPONSE; First Tip Radius: 0.062 INCHES NOMINAL IN; Left Side Flange Thickness: 0.062 INCHES NOMINAL IN; Nondefinitive Spec/std Data: 7075 ALLOY AND ANNEALED CONDITION. 18 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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