PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILS20166Angle,structural

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 9520-00-277-4959 · FSC 9520 · No Item Name Available
Verified by PartsTable
NSN 9520-00-277-4959 — this item is cataloged by the U.S. Government under National Stock Number 9520-00-277-4959. Primary manufacturer part number: MILS20166.
Features
  • Angle,structural — FSC 9520
  • Fabrication Method: EXTRUDED
  • First Tip Style: SQUARE END
  • Base Flange Thickness: 0.375 INCHES NOMINAL IN
  • Material Document and Classification: MIL-S-20166, GRADE M MIL SPEC 1ST MATERIAL RESPONSE
  • Material: STEEL COMP 1022
  • Left Side Flange Thickness: 0.375 INCHES NOMINAL IN
  • Weight Per Unit Measure: 8.500 POUNDS PER LINEAR FOOT LBS
Applications
  • Applications requiring Steel Comp 1022 construction
General Description

The Angle,structural, cataloged under National Stock Number 9520-00-277-4959, is classified within Federal Supply Class 9520 (No Item Name Available) of the Metal Bars, Sheets, and Shapes group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN9520-00-277-4959
Primary Part NumberMILS20166
Item NameAngle,structural
FSC / FSG9520 / 95 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Fabrication MethodEXTRUDED
First Tip StyleSQUARE END
Base Flange Thickness0.375 INCHES NOMINAL IN
Material Document and ClassificationMIL-S-20166, GRADE M MIL SPEC 1ST MATERIAL RESPONSE
MaterialSTEEL COMP 1022
Left Side Flange Thickness0.375 INCHES NOMINAL IN
Weight Per Unit Measure8.500 POUNDS PER LINEAR FOOT LBS
Left Inside Angle90.0 DEGREES NOMINAL
Length30.000 FEET MINIMUM AND 40.000 FEET MAXIMUM FT
Basic Shape StyleANGLE
Second Tip Relationship to First TipIDENTICAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5925-00-113-5066 INTERCHANGEABLE
Circuit Breaker
9510-00-126-1014 INTERCHANGEABLE
Bar,metal
9520-00-277-4438 INTERCHANGEABLE
Channel,structural
9520-00-277-4441 INTERCHANGEABLE
Channel,structural
9520-00-277-4457 INTERCHANGEABLE
Beam,structural
9520-00-277-4459 INTERCHANGEABLE
Beam,structural
9520-00-277-4460 INTERCHANGEABLE
Beam,structural
9520-00-277-4461 INTERCHANGEABLE
Beam,structural
9520-00-277-4462 INTERCHANGEABLE
Beam,structural
9520-00-277-4463 INTERCHANGEABLE
Beam,structural
Cross-Reference Index
Part NumberManufacturer
MILS20166 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5925-00-113-5066INTERCHANGEABLE
CIRCUIT BREAKER
9510-00-126-1014INTERCHANGEABLE
BAR,METAL
9520-00-277-4438INTERCHANGEABLE
CHANNEL,STRUCTURAL
9520-00-277-4441INTERCHANGEABLE
CHANNEL,STRUCTURAL
9520-00-277-4457INTERCHANGEABLE
BEAM,STRUCTURAL
9520-00-277-4459INTERCHANGEABLE
BEAM,STRUCTURAL
9520-00-277-4460INTERCHANGEABLE
BEAM,STRUCTURAL
9520-00-277-4461INTERCHANGEABLE
BEAM,STRUCTURAL
9520-00-277-4462INTERCHANGEABLE
BEAM,STRUCTURAL
9520-00-277-4463INTERCHANGEABLE
BEAM,STRUCTURAL
9520-00-277-4944INTERCHANGEABLE
ANGLE,STRUCTURAL
9520-00-277-5949INTERCHANGEABLE
CHANNEL,STRUCTURAL

Frequently Asked Questions

What is NSN 9520-00-277-4959?

NSN 9520-00-277-4959 is a Angle,structural, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 9520 (No Item Name Available). Status: active.

What are the part numbers for NSN 9520-00-277-4959?

NSN 9520-00-277-4959 has 1 cross-referenced part number: MILS20166 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 9520-00-277-4959?

There are 12 known substitutes for 9520-00-277-4959: 5925-00-113-5066, 9510-00-126-1014, 9520-00-277-4438 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MILS20166?

Key specifications for MILS20166: Fabrication Method: EXTRUDED; First Tip Style: SQUARE END; Base Flange Thickness: 0.375 INCHES NOMINAL IN; Material Document and Classification: MIL-S-20166, GRADE M MIL SPEC 1ST MATERIAL RESPONSE. 13 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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