The Beam,structural, cataloged under National Stock Number 9540-00-288-3686, 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 Aluminum Co of America. Government technical data includes 29 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 9540-00-288-3686 |
| Primary Part Number | 39891 |
| Item Name | Beam,structural |
| FSC / FSG | 9540 / 95 — Structural Shapes, Nonferrous Base Metal |
| Manufacturer | Aluminum Co of America |
| Status | ACTIVE |
| Right Side Top Flange Thickness | 0.091 INCHES NOMINAL IN |
| Right Side Bottom Flange Thickness | 0.125 INCHES NOMINAL IN |
| Fillet Radius Where Bottom Left Flange Joins Web Flange/leg | 0.125 INCHES NOMINAL IN |
| Length | 10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT |
| Left Bottom Inside Angle | 90.0 DEGREES NOMINAL |
| Left Side Top Flange Distance to Center of Both Flanges | 1.246 INCHES NOMINAL IN |
| Web Flange Thickness | 0.102 INCHES NOMINAL IN |
| Fourth Tip Relationship to Preceding Tips | IDENTICAL W/FIRST TIP |
| Right Top Inside Angle | 90.0 DEGREES NOMINAL |
| Left Side Bottom Flange Thickness | 0.125 INCHES NOMINAL IN |
| Left Top Inside Angle | 90.0 DEGREES NOMINAL |
| Heat Treatment | T-6 SOLUTION HEAT TREATED |
| Fillet Radius Where Top Right Flange Joins Web Flange/leg | 0.125 INCHES NOMINAL IN |
| Material Document and Classification | AMS-Q-A-200/11 FED SPEC SINGLE MATERIAL RESPONSE |
| Right Bottom Inside Angle | 90.0 DEGREES NOMINAL |
| Fillet Radius Where Top Left Flange Joins Web Flange/leg | 0.125 INCHES NOMINAL IN |
| Basic Shape Style | I SHAPE |
| Weight Per Unit Measure | 1.068 POUNDS PER LINEAR FOOT LBS |
| Nondefinitive Spec/std Data | T-6 TEMPER |
| Bottom Flange Width | 2.500 INCHES NOMINAL IN |
| Right Side Bottom Flange Distance to Center of Both Flanges | 1.254 INCHES NOMINAL IN |
| Fillet Radius Where Bottom Right Flange Joins Web Flange/leg | 0.125 INCHES NOMINAL IN |
| Top Flange Width | 2.500 INCHES NOMINAL IN |
| Third Tip Relationship to Preceding Tips | IDENTICAL W/FIRST TIP |
| Material | ALUMINUM ALLOY 7075 |
| Fabrication Method | EXTRUDED |
| Left Side Bottom Flange Distance to Center of Both Flanges | 1.246 INCHES NOMINAL IN |
| First Tip Style | SQUARE END |
| Left Side Top Flange Thickness | 0.091 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 |
| Part Number | Manufacturer |
|---|---|
| 39891 PRIMARY | Aluminum Co of America (USA) |
| AMS-QQ-A-200/11 ALLOY 7075 TMPR | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| AMS-STD-184 | 5/9 Secondary reference U.S. Government activity |
| AMS-QQ-A-200/11 ALLOY 7075 TMPR | 5/9 Secondary reference U.S. Government activity |
| PA12597 | 5/9 Secondary reference Transtar Metals Corp |
| 120078 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| AMS-QQ-A-200/11 | 5/9 Secondary reference U.S. Government activity |
| QQ-A-200/11 | 5/9 Secondary reference U.S. Government activity |
| AMS-STD-184 | 5/1 Secondary reference Sae International Dba Sae International |
NSN 9540-00-288-3686 is a Beam,structural, manufactured by Aluminum Co of America, classified under FSC 9540, Structural Shapes, Nonferrous Base Metal. Status: active.
NSN 9540-00-288-3686 has 2 manufacturer part numbers on file: 39891 (Aluminum Co of America), AMS-QQ-A-200/11 ALLOY 7075 TMPR (Sae International Dba Sae International).
3 possible matches (shared part number, not a government interchangeability claim): 9540-00-540-5941, 5310-01-268-1567, 2590-01-568-6461. Verify interchangeability with system specifications before substitution.
Key specifications for 39891: Overall Height: 3.531 INCHES NOMINAL IN; Right Side Top Flange Thickness: 0.091 INCHES NOMINAL IN; Right Side Bottom Flange Thickness: 0.125 INCHES NOMINAL IN; Fillet Radius Where Bottom Left Flange Joins Web Flange/leg: 0.125 INCHES NOMINAL IN. 29 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.