PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

78UAngle,structural

Aluminum Co of America · NSN 9540-00-148-4342 · FSC 9540 · No Item Name Available
Verified by PartsTable
NSN 9540-00-148-4342 — this item is cataloged by the U.S. Government under National Stock Number 9540-00-148-4342. Primary manufacturer part number: 78U.
Features
  • Angle,structural — FSC 9540
  • First Tip Style: RIGHT QUARTER RADIUS
  • Heat Treatment: T-6 SOLUTION HEAT TREATED
  • First Tip Radius: 0.125 INCHES NOMINAL IN
  • Second Tip Relationship to First Tip: NOT IDENTICAL
  • Left Side Flange Thickness: 0.125 INCHES NOMINAL IN
  • Fillet Radius Where Left Flange Joins Base Flange: 0.188 INCHES NOMINAL IN
  • Second Tip Radius: 0.125 INCHES NOMINAL IN
Applications
  • Applications requiring Aluminum Alloy 7075 construction
General Description

The Angle,structural, cataloged under National Stock Number 9540-00-148-4342, 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 Aluminum Co of America. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN9540-00-148-4342
Primary Part Number78U
Item NameAngle,structural
FSC / FSG9540 / 95 — No Item Name Available
ManufacturerAluminum Co of America
StatusCANCELLED
First Tip StyleRIGHT QUARTER RADIUS
Heat TreatmentT-6 SOLUTION HEAT TREATED
First Tip Radius0.125 INCHES NOMINAL IN
Second Tip Relationship to First TipNOT IDENTICAL
Left Side Flange Thickness0.125 INCHES NOMINAL IN
Fillet Radius Where Left Flange Joins Base Flange0.188 INCHES NOMINAL IN
Second Tip Radius0.125 INCHES NOMINAL IN
Material Document and ClassificationAMS-Q-A-200/11 FED SPEC SINGLE MATERIAL RESPONSE
Second Tip StyleUPPER RADIUS
Basic Shape StyleANGLE
Weight Per Unit Measure0.320 POUNDS PER LINEAR FOOT LBS
Base Flange Thickness0.125 INCHES NOMINAL IN
Left Inside Angle90.0 DEGREES NOMINAL
Length10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT
MaterialALUMINUM ALLOY 7075
Nondefinitive Spec/std Data7075 ALLOY AND T6 TEMPER
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 1
9540-00-119-9019LS 334 INTERCHANGEABLE
Angle,structural
Lockheed Martin Corp
Cross-Reference Index
Part NumberManufacturer
78U Aluminum Co of America (USA)
ASTM B221 American Society for Testing and Materials Dba Astm International (USA)
1M126 The Boeing Company Div Defense (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)
AMS-QQ-A-200/11 Sae International Dba Sae International (USA)
Related Parts
9540-00-119-9019INTERCHANGEABLE
ANGLE,STRUCTURAL
LS 334

Frequently Asked Questions

What is NSN 9540-00-148-4342?

NSN 9540-00-148-4342 is a Angle,structural, manufactured by Aluminum Co of America, classified under FSC 9540 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 9540-00-148-4342?

NSN 9540-00-148-4342 has 6 cross-referenced part numbers: 78U (Aluminum Co of America), ASTM B221 (American Society for Testing and Materials Dba Astm International), 1M126 (The Boeing Company Div Defense), QQ-A-200/11 (Federal Specifications Promulgated by General Services Administration Washington DC), AMS-QQ-A-200/11 (Society of Automotive Engineers Inc) and 1 more.

What NSN replaces 9540-00-148-4342?

There is 1 known substitute for 9540-00-148-4342: 9540-00-119-9019. Verify interchangeability with system specifications before substitution.

What are the specifications of 78U?

Key specifications for 78U: First Tip Style: RIGHT QUARTER RADIUS; Heat Treatment: T-6 SOLUTION HEAT TREATED; First Tip Radius: 0.125 INCHES NOMINAL IN; Second Tip Relationship to First Tip: NOT IDENTICAL. 18 total characteristics are documented in the Federal Logistics Information System.

Is NSN 9540-00-148-4342 still in active supply?

NSN 9540-00-148-4342 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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