The Angle,structural, cataloged under National Stock Number 9540-01-071-6521, is classified within Federal Supply Class 9540 (Structural Shapes, Nonferrous Base Metal) of the Metal Bars, Sheets, and Shapes group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 9540-01-071-6521 |
| Item Name | Angle,structural |
| FSC / FSG | 9540 / 95 — Structural Shapes, Nonferrous Base Metal |
| Status | ACTIVE |
| Length | 10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT |
| Base Flange Thickness | 0.063 INCHES NOMINAL IN |
| Heat Treatment | T-8511 SOLUTION HEAT TREATED |
| First Tip Radius | 0.063 INCHES NOMINAL IN |
| Material Document and Classification | AMS-QQ-A-200/3 FED SPEC SINGLE MATERIAL RESPONSE |
| Left Side Flange Thickness | 0.063 INCHES NOMINAL IN |
| Second Tip Radius | 0.063 INCHES NOMINAL IN |
| Basic Shape Style | ANGLE |
| Fillet Radius Where Left Flange Joins Base Flange | 0.125 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | 2024 ALLOY AND T8511 TEMPER |
| Left Inside Angle | 90.0 DEGREES NOMINAL |
| Material | ALUMINUM ALLOY 2024 |
| Fabrication Method | EXTRUDED |
| First Tip Style | RIGHT QUARTER RADIUS |
| Second Tip Relationship to First Tip | NOT IDENTICAL |
| Second Tip Style | UPPER RADIUS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| QQ-A-200/3 | 5/9 Secondary reference U.S. Government activity |
| K10A25T8511 | 5/1 Secondary reference U.S. Government activity |
| MS14284E049 | 2/2 Government specification standardization U.S. Government activity |
| ASTM B221 | 5/9 Secondary reference U.S. Government activity |
| AMS-QQ-A-200/3 | 5/9 Secondary reference U.S. Government activity |
| AND10134-1003 | 5/1 Secondary reference U.S. Government activity |
| 9540PL0901164 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| AMS-QQ-A-200/3 | 5/1 Secondary reference Sae International Dba Sae International |
| AND10134-1003/QQ-A-200/3-T8511 | 5/1 Secondary reference Defense Logistics Agency Dba Defense Supply Center Philadelphia |
NSN 9540-01-071-6521 is a Angle,structural, classified under FSC 9540, Structural Shapes, Nonferrous Base Metal. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 9540-01-175-7694, 1560-01-208-3210, 1560-01-208-3211. Verify interchangeability with system specifications before substitution.
Key specifications for 9540-01-071-6521: Overall Height: 0.750 INCHES NOMINAL IN; Length: 10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT; Base Flange Thickness: 0.063 INCHES NOMINAL IN; Heat Treatment: T-8511 SOLUTION HEAT TREATED. 16 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.