The Beam,structural, cataloged under National Stock Number 9540-01-491-9708, is classified within Federal Supply Class 9540 (Structural Shapes, Nonferrous Base Metal) of the Metal Bars, Sheets, and Shapes group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 9540-01-491-9708 |
| Item Name | Beam,structural |
| FSC / FSG | 9540 / 95 — Structural Shapes, Nonferrous Base Metal |
| Status | ACTIVE |
| Right Side Top Flange Thickness | 0.016 INCHES NOMINAL IN |
| Fillet Radius Where Top Right Flange Joins Web Flange/leg | 0.094 INCHES NOMINAL IN |
| Fillet Radius Where Top Left Flange Joins Web Flange/leg | 0.094 INCHES NOMINAL IN |
| Basic Shape Style | T SHAPE |
| Top Flange Width | 3.820 INCHES NOMINAL IN |
| Leg Thickness | 0.0910 INCHES NOMINAL IN |
| Left Side Top Flange Thickness | 0.016 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 |
|---|---|
| LS1018 | 3/2 Design control — primary reference U.S. Government activity |
NSN 9540-01-491-9708 is a Beam,structural, classified under FSC 9540, Structural Shapes, Nonferrous Base Metal. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5895-01-549-5361. Verify interchangeability with system specifications before substitution.
Key specifications for 9540-01-491-9708: Overall Height: 1.336 INCHES NOMINAL IN; Right Side Top Flange Thickness: 0.016 INCHES NOMINAL IN; Fillet Radius Where Top Right Flange Joins Web Flange/leg: 0.094 INCHES NOMINAL IN; Fillet Radius Where Top Left Flange Joins Web Flange/leg: 0.094 INCHES NOMINAL IN. 7 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.