PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ASTM B221Angle,structural

American Society for Testing and Materials Dba Astm International · NSN 9540-01-071-6540 · FSC 9540 · No Item Name Available
Verified by PartsTable
NSN 9540-01-071-6540 — this item is cataloged by the U.S. Government under National Stock Number 9540-01-071-6540. Primary manufacturer part number: ASTM B221.
Features
  • Angle,structural — FSC 9540
  • Left Side Flange Thickness: 0.063 INCHES NOMINAL IN
  • Fillet Radius Where Left Flange Joins Base Flange: 0.063 INCHES NOMINAL IN
  • Length: 10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT
  • Material: ALUMINUM ALLOY 2024
  • Second Tip Style: UPPER RADIUS
  • Heat Treatment: T-8511 SOLUTION HEAT TREATED
  • Base Flange Thickness: 0.063 INCHES NOMINAL IN
Applications
  • Applications requiring Aluminum Alloy 2024 construction
General Description

The Angle,structural, cataloged under National Stock Number 9540-01-071-6540, 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 10 commercial cross-references from 9 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN9540-01-071-6540
Primary Part NumberASTM B221
Item NameAngle,structural
FSC / FSG9540 / 95 — No Item Name Available
ManufacturerAmerican Society for Testing and Materials Dba Astm International
StatusACTIVE
Left Side Flange Thickness0.063 INCHES NOMINAL IN
Fillet Radius Where Left Flange Joins Base Flange0.063 INCHES NOMINAL IN
Length10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT
MaterialALUMINUM ALLOY 2024
Second Tip StyleUPPER RADIUS
Heat TreatmentT-8511 SOLUTION HEAT TREATED
Base Flange Thickness0.063 INCHES NOMINAL IN
First Tip Radius0.063 INCHES NOMINAL IN
Basic Shape StyleANGLE
Nondefinitive Spec/std Data2024 ALLOY AND T8511 TEMPER
Material Document and ClassificationAMS-QQ-A-200/3 FED SPEC SINGLE MATERIAL RESPONSE
First Tip StyleRIGHT QUARTER RADIUS
Second Tip Relationship to First TipNOT IDENTICAL
Second Tip Radius0.063 INCHES NOMINAL IN
Fabrication MethodEXTRUDED
Left Inside Angle90.0 DEGREES NOMINAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
9540-00-231-9921 INTERCHANGEABLE
Angle,structural
9540-01-071-5883 INTERCHANGEABLE
Angle,structural
9540-01-106-7628 INTERCHANGEABLE
Angle,structural
9540-01-127-8708 INTERCHANGEABLE
Angle,structural
Cross-Reference Index
Part NumberManufacturer
ASTM B221 American Society for Testing and Materials Dba Astm International (USA)
AMS-QQ-A-200/3 Society of Automotive Engineers Inc (USA)
9540PL0901171 Jednolity Indeks Materialowy - Uniform Material Index (POL)
AND10134-0601 Airforce-Navy Aeronautical Design Standard
AMS-QQ-A-200/3 Sae International Dba Sae International (USA)
MS14284E015 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
AND10134-0601/QQ-A-200/3-T8511 Defense Logistics Agency Dba Defense Supply Center Philadelphia (USA)
9540PL1882327 Jednolity Indeks Materialowy - Uniform Material Index (POL)
QQ-A-200/3 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
K10A16T8511 Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company (USA)
Related Parts
9540-00-231-9921INTERCHANGEABLE
ANGLE,STRUCTURAL
9540-01-071-5883INTERCHANGEABLE
ANGLE,STRUCTURAL
9540-01-106-7628INTERCHANGEABLE
ANGLE,STRUCTURAL
9540-01-127-8708INTERCHANGEABLE
ANGLE,STRUCTURAL

Frequently Asked Questions

What is NSN 9540-01-071-6540?

NSN 9540-01-071-6540 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 9540-01-071-6540?

NSN 9540-01-071-6540 has 10 cross-referenced part numbers: ASTM B221 (American Society for Testing and Materials Dba Astm International), AMS-QQ-A-200/3 (Society of Automotive Engineers Inc), 9540PL0901171 (Jednolity Indeks Materialowy - Uniform Material Index), AND10134-0601 (Airforce-Navy Aeronautical Design Standard), AMS-QQ-A-200/3 (Sae International Dba Sae International) and 5 more.

What NSN replaces 9540-01-071-6540?

There are 4 known substitutes for 9540-01-071-6540: 9540-00-231-9921, 9540-01-071-5883, 9540-01-106-7628 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of ASTM B221?

Key specifications for ASTM B221: Left Side Flange Thickness: 0.063 INCHES NOMINAL IN; Fillet Radius Where Left Flange Joins Base Flange: 0.063 INCHES NOMINAL IN; Length: 10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT; Material: ALUMINUM ALLOY 2024. 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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