PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ASTM B221Angle,structural

American Society for Testing and Materials Dba Astm International · NSN 9540-01-071-4727 · FSC 9540 · No Item Name Available
Verified by PartsTable
NSN 9540-01-071-4727 — this item is cataloged by the U.S. Government under National Stock Number 9540-01-071-4727. Primary manufacturer part number: ASTM B221.
Features
  • Angle,structural — FSC 9540
  • Left Side Flange Thickness: 0.063 INCHES NOMINAL IN
  • First Tip Style: RIGHT QUARTER RADIUS
  • Material: ALUMINUM ALLOY 6061
  • Left Inside Angle: 90.0 DEGREES NOMINAL
  • Basic Shape Style: ANGLE
  • Length: 10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT
  • Fillet Radius Where Left Flange Joins Base Flange: 0.188 INCHES NOMINAL IN
Applications
  • Applications requiring Aluminum Alloy 6061 construction
General Description

The Angle,structural, cataloged under National Stock Number 9540-01-071-4727, 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 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN9540-01-071-4727
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
First Tip StyleRIGHT QUARTER RADIUS
MaterialALUMINUM ALLOY 6061
Left Inside Angle90.0 DEGREES NOMINAL
Basic Shape StyleANGLE
Length10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT
Fillet Radius Where Left Flange Joins Base Flange0.188 INCHES NOMINAL IN
Heat TreatmentT-6511 SOLUTION HEAT TREATED
Base Flange Thickness0.063 INCHES NOMINAL IN
Fabrication MethodEXTRUDED
Nondefinitive Spec/std Data6061 ALLOY AND T6511 TEMPER
Material Document and ClassificationAMS-QQ-A-200/8 FED SPEC SINGLE MATERIAL RESPONSE
First Tip Radius0.063 INCHES NOMINAL IN
Second Tip Relationship to First TipNOT IDENTICAL
Weight Per Unit Measure0.154 POUNDS PER LINEAR FOOT LBS
Second Tip StyleUPPER RADIUS
Second Tip Radius0.063 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
9540-00-006-4911 INTERCHANGEABLE
Angle,structural
9540-00-145-4503 INTERCHANGEABLE
Angle,structural
9540-00-185-4224 INTERCHANGEABLE
Angle,structural
9540-00-236-3953 INTERCHANGEABLE
Angle,structural
9540-00-501-6128 INTERCHANGEABLE
Angle,structural
9540-00-720-1326 INTERCHANGEABLE
Angle,structural
9540-00-727-0191 INTERCHANGEABLE
Angle,structural
9540-01-072-4784 INTERCHANGEABLE
Angle,structural
9540-01-073-5151 INTERCHANGEABLE
Angle,structural
Cross-Reference Index
Part NumberManufacturer
ASTM B221 American Society for Testing and Materials Dba Astm International (USA)
AMS-QQ-A-200/8 Sae International Dba Sae International (USA)
SAE-AMS-QQ-A-200/8 Sae International Dba Sae International (USA)
QQ-A-200/8 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
AMS-QQ-A-200/8 Society of Automotive Engineers Inc (USA)
10552-A Pimalco Inc. Div Alcoa Inc Global Hard Alloy Extrusions (USA)
AND10133-1001 Airforce-Navy Aeronautical Design Standard
K10B39T6511 Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company (USA)
Related Parts
9540-00-006-4911INTERCHANGEABLE
ANGLE,STRUCTURAL
9540-00-145-4503INTERCHANGEABLE
ANGLE,STRUCTURAL
9540-00-185-4224INTERCHANGEABLE
ANGLE,STRUCTURAL
9540-00-236-3953INTERCHANGEABLE
ANGLE,STRUCTURAL
9540-00-501-6128INTERCHANGEABLE
ANGLE,STRUCTURAL
9540-00-720-1326INTERCHANGEABLE
ANGLE,STRUCTURAL
9540-00-727-0191INTERCHANGEABLE
ANGLE,STRUCTURAL
9540-01-072-4784INTERCHANGEABLE
ANGLE,STRUCTURAL
9540-01-073-5151INTERCHANGEABLE
ANGLE,STRUCTURAL

Frequently Asked Questions

What is NSN 9540-01-071-4727?

NSN 9540-01-071-4727 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 9540-01-071-4727?

NSN 9540-01-071-4727 has 8 cross-referenced part numbers: ASTM B221 (American Society for Testing and Materials Dba Astm International), AMS-QQ-A-200/8 (Sae International Dba Sae International), SAE-AMS-QQ-A-200/8 (Sae International Dba Sae International), QQ-A-200/8 (Federal Specifications Promulgated by General Services Administration Washington DC), AMS-QQ-A-200/8 (Society of Automotive Engineers Inc) and 3 more.

What NSN replaces 9540-01-071-4727?

There are 9 known substitutes for 9540-01-071-4727: 9540-00-006-4911, 9540-00-145-4503, 9540-00-185-4224 and 6 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; First Tip Style: RIGHT QUARTER RADIUS; Material: ALUMINUM ALLOY 6061; Left Inside Angle: 90.0 DEGREES NOMINAL. 19 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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