The Beam,structural, cataloged under National Stock Number 9540-01-230-0479, is classified within Federal Supply Class 9540 (Structural Shapes, Nonferrous Base Metal) of the Metal Bars, Sheets, and Shapes group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 9540-01-230-0479 |
| Item Name | Beam,structural |
| FSC / FSG | 9540 / 95 — Structural Shapes, Nonferrous Base Metal |
| Status | ACTIVE |
| Right Side Top Flange Thickness | 0.188 INCHES NOMINAL IN |
| Length | 7.874 FEET NOMINAL FT |
| Left Side Top Flange Distance to Center of Both Flanges | 1.125 INCHES NOMINAL IN |
| Right Top Inside Angle | 90.0 DEGREES NOMINAL |
| Left Top Inside Angle | 90.0 DEGREES NOMINAL |
| Fillet Radius Where Top Right Flange Joins Web Flange/leg | 0.125 INCHES NOMINAL IN |
| First Tip Radius | 0.188 INCHES NOMINAL IN |
| Material Document and Classification | MIL-A-12545 MIL SPEC SINGLE MATERIAL RESPONSE |
| Fillet Radius Where Top Left Flange Joins Web Flange/leg | 0.125 INCHES NOMINAL IN |
| Second Tip Radius | 0.188 INCHES NOMINAL IN |
| Basic Shape Style | T SHAPE |
| Weight Per Unit Measure | 0.874 POUNDS PER LINEAR FOOT LBS |
| Top Flange Width | 2.250 INCHES NOMINAL IN |
| Third Tip Relationship to Preceding Tips | IDENTICAL W/SECOND TIP |
| Material | ALUMINUM ALLOY 7075 |
| Fabrication Method | EXTRUDED |
| Leg Thickness | 0.188 INCHES NOMINAL IN |
| First Tip Style | FULL RADIUS |
| Left Side Top Flange Thickness | 0.188 INCHES NOMINAL IN |
| Second Tip Relationship to First Tip | NOT IDENTICAL |
| Right Side Top Flange Distance to Center of Both Flanges | 1.125 INCHES NOMINAL IN |
| 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 |
|---|---|
| NAS344-61 | 3/2 Design control — primary reference U.S. Government activity |
| 20817 | 5/9 Secondary reference International Light Metals Corp Sub of Martin Marietta Corp |
NSN 9540-01-230-0479 is a Beam,structural, classified under FSC 9540, Structural Shapes, Nonferrous Base Metal. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 3020-01-267-7961, 5315-01-434-1071, 5950-01-548-8006. Verify interchangeability with system specifications before substitution.
Key specifications for 9540-01-230-0479: Overall Height: 1.875 INCHES NOMINAL IN; Right Side Top Flange Thickness: 0.188 INCHES NOMINAL IN; Length: 7.874 FEET NOMINAL FT; Left Side Top Flange Distance to Center of Both Flanges: 1.125 INCHES NOMINAL IN. 22 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.