The Beam,structural, cataloged under National Stock Number 9540-01-558-7799, 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16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 9540-01-558-7799 |
| Item Name | Beam,structural |
| FSC / FSG | 9540 / 95 — Structural Shapes, Nonferrous Base Metal |
| Status | ACTIVE |
| Right Side Top Flange Thickness | 0.125 INCHES NOMINAL IN |
| Right Side Bottom Flange Thickness | 0.125 INCHES NOMINAL IN |
| Web Flange Thickness | 0.125 INCHES NOMINAL IN |
| Fourth Tip Relationship to Preceding Tips | NOT IDENTICAL |
| Third Tip Style | LEFT QUARTER RADIUS |
| Left Side Bottom Flange Thickness | 0.125 INCHES NOMINAL IN |
| Fourth Tip Style | UPPER RADIUS |
| Heat Treatment | TEMPERED |
| Basic Shape Style | I SHAPE |
| Bottom Flange Width | 2.000 INCHES NOMINAL IN |
| Top Flange Width | 2.000 INCHES NOMINAL IN |
| Third Tip Relationship to Preceding Tips | NOT IDENTICAL |
| Material | ALUMINUM ALLOY 7075 |
| Left Side Top Flange Thickness | 0.125 INCHES NOMINAL IN |
| Second Tip Relationship to First Tip | NOT IDENTICAL |
| Second Tip Style | LOWER 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 |
|---|---|
| LS31091-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 9540-01-558-7799 is a Beam,structural, classified under FSC 9540, Structural Shapes, Nonferrous Base Metal. Status: active.
Key specifications for 9540-01-558-7799: Overall Height: 1.500 INCHES NOMINAL IN; Right Side Top Flange Thickness: 0.125 INCHES NOMINAL IN; Right Side Bottom Flange Thickness: 0.125 INCHES NOMINAL IN; Web Flange Thickness: 0.125 INCHES NOMINAL IN. 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.