The Beam,structural, cataloged under National Stock Number 9540-01-271-2603, is classified within Federal Supply Class 9540 (Structural Shapes, Nonferrous Base Metal) of the Metal Bars, Sheets, and Shapes group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 9540-01-271-2603 |
| Primary Part Number | 1MA180B04-10238 |
| Item Name | Beam,structural |
| FSC / FSG | 9540 / 95 — Structural Shapes, Nonferrous Base Metal |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Right Side Bottom Flange Thickness | 0.050 INCHES NOMINAL IN |
| Length | 10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT |
| Web Flange Thickness | 0.100 INCHES NOMINAL IN |
| Left Top Inside Angle | 119.0 DEGREES NOMINAL |
| Heat Treatment | T-8511 SOLUTION HEAT TREATED |
| Material Document and Classification | AMS-QQ-A-200/3 FED SPEC SINGLE MATERIAL RESPONSE |
| Right Bottom Inside Angle | 119.0 DEGREES NOMINAL |
| Fillet Radius Where Top Left Flange Joins Web Flange/leg | 0.090 INCHES NOMINAL IN |
| Second Tip Radius | 0.310 INCHES NOMINAL IN |
| Basic Shape Style | Z SHAPE |
| Weight Per Unit Measure | 0.156 POUNDS PER LINEAR FOOT LBS |
| Nondefinitive Spec/std Data | 7075 ALLOY AND T8511 TEMPER |
| Bottom Flange Width | 1.170 INCHES NOMINAL IN |
| Fillet Radius Where Bottom Right Flange Joins Web Flange/leg | 0.090 INCHES NOMINAL IN |
| Top Flange Width | 1.070 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 2024 |
| Fabrication Method | EXTRUDED |
| First Tip Style | SQUARE END |
| Left Side Top Flange Thickness | 0.050 INCHES NOMINAL IN |
| Second Tip Relationship to First Tip | NOT IDENTICAL |
| Second Tip Style | UPPER RADIUS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1MA180B04-10238 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 60-5288 | 3/1 Design control — primary reference Transtar Metals Corp |
| AMS-QQ-A-200/3 | 3/1 Design control — primary reference Sae International Dba Sae International |
| AMS-QQ-A-200/3 | 5/9 Secondary reference U.S. Government activity |
NSN 9540-01-271-2603 is a Beam,structural, manufactured by The Boeing Company Div Defense, classified under FSC 9540, Structural Shapes, Nonferrous Base Metal. Status: active.
NSN 9540-01-271-2603 has 1 manufacturer part number on file: 1MA180B04-10238 (The Boeing Company Div Defense).
Key specifications for 1MA180B04-10238: Overall Height: 0.257 INCHES NOMINAL IN; Right Side Bottom Flange Thickness: 0.050 INCHES NOMINAL IN; Length: 10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT; Web Flange Thickness: 0.100 INCHES NOMINAL IN. 21 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.