The Beam,structural, cataloged under National Stock Number 9540-01-437-4998, is classified within Federal Supply Class 9540 (Structural Shapes, Nonferrous Base Metal) of the Metal Bars, Sheets, and Shapes group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 9540-01-437-4998 |
| Item Name | Beam,structural |
| FSC / FSG | 9540 / 95 — Structural Shapes, Nonferrous Base Metal |
| Status | ACTIVE |
| Right Side Bottom Flange Thickness | 0.080 INCHES NOMINAL IN |
| Length | 12.000 FEET NOMINAL FT |
| Web Flange Thickness | 0.045 INCHES NOMINAL IN |
| Left Top Inside Angle | 90.0 DEGREES NOMINAL |
| Heat Treatment | ANNEALED |
| Material Document and Classification | MIL-T-81556, COMP AB-1 MIL SPEC SINGLE MATERIAL RESPONSE |
| Right Bottom Inside Angle | 90.0 DEGREES NOMINAL |
| Fillet Radius Where Top Left Flange Joins Web Flange/leg | 0.090 INCHES NOMINAL IN |
| Basic Shape Style | Z SHAPE |
| Nondefinitive Spec/std Data | AB-1 COMPOSITION AND ANNEALED CONDITION |
| Bottom Flange Width | 0.750 INCHES NOMINAL IN |
| Fillet Radius Where Bottom Right Flange Joins Web Flange/leg | 0.090 INCHES NOMINAL IN |
| Top Flange Width | 0.600 INCHES NOMINAL IN |
| Material | TITANIUM ALLOY |
| Fabrication Method | EXTRUDED |
| First Tip Style | SQUARE END |
| Left Side Top Flange Thickness | 0.070 INCHES NOMINAL IN |
| Second Tip Relationship to First Tip | IDENTICAL |
| 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 |
|---|---|
| MIL-T-81556 | 4/1 Identification reference U.S. Government activity |
| CVC10030-17GA | 3/2 Design control — primary reference U.S. Government activity |
NSN 9540-01-437-4998 is a Beam,structural, classified under FSC 9540, Structural Shapes, Nonferrous Base Metal. Status: active.
Key specifications for 9540-01-437-4998: Overall Height: 0.700 INCHES NOMINAL IN; Right Side Bottom Flange Thickness: 0.080 INCHES NOMINAL IN; Length: 12.000 FEET NOMINAL FT; Web Flange Thickness: 0.045 INCHES NOMINAL IN. 18 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.