The Beam,structural, cataloged under National Stock Number 9540-01-072-9578, is classified within Federal Supply Class 9540 (Structural Shapes, Nonferrous Base Metal) of the Metal Bars, Sheets, and Shapes group. Government technical data includes 24 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 9540-01-072-9578 |
| Item Name | Beam,structural |
| FSC / FSG | 9540 / 95 — Structural Shapes, Nonferrous Base Metal |
| Status | ACTIVE |
| Third Tip Radius | 0.078 INCHES NOMINAL IN |
| Right Side Top Flange Thickness | 0.156 INCHES NOMINAL IN |
| Length | 10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT |
| Left Side Top Flange Distance to Center of Both Flanges | 1.375 INCHES NOMINAL IN |
| Right Top Inside Angle | 90.0 DEGREES NOMINAL |
| Third Tip Style | FULL RADIUS |
| Left Top Inside Angle | 90.0 DEGREES NOMINAL |
| Heat Treatment | O-ANNEALED |
| Fillet Radius Where Top Right Flange Joins Web Flange/leg | 0.125 INCHES NOMINAL IN |
| First Tip Radius | 0.156 INCHES NOMINAL IN |
| Material Document and Classification | AMS-QQ-A-200/3 FED SPEC SINGLE MATERIAL RESPONSE |
| Fillet Radius Where Top Left Flange Joins Web Flange/leg | 0.125 INCHES NOMINAL IN |
| Basic Shape Style | T SHAPE |
| Weight Per Unit Measure | 0.736 POUNDS PER LINEAR FOOT LBS |
| Nondefinitive Spec/std Data | O TEMPER |
| Top Flange Width | 2.750 INCHES NOMINAL IN |
| Third Tip Relationship to Preceding Tips | NOT IDENTICAL |
| Material | ALUMINUM ALLOY 2024 |
| Fabrication Method | EXTRUDED |
| Leg Thickness | 0.156 INCHES NOMINAL IN |
| First Tip Style | LOWER RADIUS |
| Left Side Top Flange Thickness | 0.156 INCHES NOMINAL IN |
| Second Tip Relationship to First Tip | IDENTICAL |
| Right Side Top Flange Distance to Center of Both Flanges | 1.375 INCHES NOMINAL IN |
| 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 |
|---|---|
| 43078 | 5/9 Secondary reference International Light Metals Corp Sub of Martin Marietta Corp |
| K40A160O | 5/1 Secondary reference U.S. Government activity |
| NAS344-64 | 5/1 Secondary reference U.S. Government activity |
| QQ-A-200/3 | 5/9 Secondary reference U.S. Government activity |
| MS14376E039 | 2/2 Government specification standardization U.S. Government activity |
| AMS-QQ-A-200/3 | 5/1 Secondary reference Sae International Dba Sae International |
| AMS-QQ-A-200/3 | 5/9 Secondary reference U.S. Government activity |
NSN 9540-01-072-9578 is a Beam,structural, classified under FSC 9540, Structural Shapes, Nonferrous Base Metal. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 2990-01-173-9661, 5365-01-373-3226. Verify interchangeability with system specifications before substitution.
Key specifications for 9540-01-072-9578: Third Tip Radius: 0.078 INCHES NOMINAL IN; Overall Height: 1.375 INCHES NOMINAL IN; Right Side Top Flange Thickness: 0.156 INCHES NOMINAL IN; Length: 10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT. 24 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.