PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ASTM B221Angle,structural

American Society for Testing and Materials Dba Astm International · NSN 9540-00-931-7261 · FSC 9540 · No Item Name Available
Verified by PartsTable
NSN 9540-00-931-7261 — this item is cataloged by the U.S. Government under National Stock Number 9540-00-931-7261. Primary manufacturer part number: ASTM B221.
Features
  • Angle,structural — FSC 9540
  • Second Tip Style: UPPER RADIUS
  • Second Tip Radius: 0.188 INCHES NOMINAL IN
  • Base Flange Thickness: 0.188 INCHES NOMINAL IN
  • Left Side Flange Thickness: 0.188 INCHES NOMINAL IN
  • Basic Shape Style: ANGLE
  • Material: ALUMINUM ALLOY 2024
  • Fillet Radius Where Left Flange Joins Base Flange: 0.250 INCHES NOMINAL IN
Applications
  • Applications requiring Aluminum Alloy 2024 construction
General Description

The Angle,structural, cataloged under National Stock Number 9540-00-931-7261, 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 5 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN9540-00-931-7261
Primary Part NumberASTM B221
Item NameAngle,structural
FSC / FSG9540 / 95 — No Item Name Available
ManufacturerAmerican Society for Testing and Materials Dba Astm International
StatusCANCELLED
Second Tip StyleUPPER RADIUS
Second Tip Radius0.188 INCHES NOMINAL IN
Base Flange Thickness0.188 INCHES NOMINAL IN
Left Side Flange Thickness0.188 INCHES NOMINAL IN
Basic Shape StyleANGLE
MaterialALUMINUM ALLOY 2024
Fillet Radius Where Left Flange Joins Base Flange0.250 INCHES NOMINAL IN
Heat TreatmentT-3511 SOLUTION HEAT TREATED
Length10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT
Material Document and ClassificationAMS-QQ-A-200/3 FED SPEC SINGLE MATERIAL RESPONSE
Nondefinitive Spec/std Data2024 ALLOY AND T3511 TEMPER
First Tip StyleRIGHT QUARTER RADIUS
First Tip Radius0.188 INCHES NOMINAL IN
Weight Per Unit Measure0.860 POUNDS PER LINEAR FOOT LBS
Second Tip Relationship to First TipNOT IDENTICAL
Fabrication MethodEXTRUDED
Left Inside Angle90.0 DEGREES NOMINAL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
9540-00-197-9847 INTERCHANGEABLE
Angle,structural
9540-00-231-9911 INTERCHANGEABLE
Angle,structural
Cross-Reference Index
Part NumberManufacturer
ASTM B221 American Society for Testing and Materials Dba Astm International (USA)
AND10133-2003 Airforce-Navy Aeronautical Design Standard
QQA200-3 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
AMS-QQ-A-200/3 Society of Automotive Engineers Inc (USA)
AMS-QQ-A-200/3 Sae International Dba Sae International (USA)
Related Parts
9540-00-197-9847INTERCHANGEABLE
ANGLE,STRUCTURAL
9540-00-231-9911INTERCHANGEABLE
ANGLE,STRUCTURAL

Frequently Asked Questions

What is NSN 9540-00-931-7261?

NSN 9540-00-931-7261 is a Angle,structural, manufactured by American Society for Testing and Materials Dba Astm International, classified under FSC 9540 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 9540-00-931-7261?

NSN 9540-00-931-7261 has 5 cross-referenced part numbers: ASTM B221 (American Society for Testing and Materials Dba Astm International), AND10133-2003 (Airforce-Navy Aeronautical Design Standard), QQA200-3 (Federal Specifications Promulgated by General Services Administration Washington DC), AMS-QQ-A-200/3 (Society of Automotive Engineers Inc), AMS-QQ-A-200/3 (Sae International Dba Sae International).

What NSN replaces 9540-00-931-7261?

There are 2 known substitutes for 9540-00-931-7261: 9540-00-197-9847, 9540-00-231-9911. Verify interchangeability with system specifications before substitution.

What are the specifications of ASTM B221?

Key specifications for ASTM B221: Second Tip Style: UPPER RADIUS; Second Tip Radius: 0.188 INCHES NOMINAL IN; Base Flange Thickness: 0.188 INCHES NOMINAL IN; Left Side Flange Thickness: 0.188 INCHES NOMINAL IN. 19 total characteristics are documented in the Federal Logistics Information System.

Is NSN 9540-00-931-7261 still in active supply?

NSN 9540-00-931-7261 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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