The Channel,structural, cataloged under National Stock Number 9540-01-494-7421, 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 14 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 9540-01-494-7421 |
| Primary Part Number | ST3M544N14D |
| Item Name | Channel,structural |
| FSC / FSG | 9540 / 95 — Structural Shapes, Nonferrous Base Metal |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Length | 72.000 INCHES NOMINAL IN |
| Base Flange Thickness | 0.080 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN |
| Left Side Flange Height | 0.298 INCHES MAXIMUM IN |
| Fillet Radius Where Right Flange Joins Base Flange | 0.020 INCHES MAXIMUM IN |
| Left Side Flange Thickness | 0.040 INCHES NOMINAL IN |
| Basic Shape Style | CHANNEL |
| Right Side Flange Height | 0.298 INCHES MAXIMUM IN |
| Fillet Radius Where Left Flange Joins Base Flange | 0.020 INCHES MAXIMUM IN |
| Right Side Flange Thickness | 0.040 INCHES NOMINAL IN |
| Right Inside Angle | 90.0 DEGREES NOMINAL |
| Left Inside Angle | 90.0 DEGREES NOMINAL |
| Material | ALUMINUM ALLOY 7075 AND ALUMINUM ALLOY 7072 |
| First Tip Style | SQUARE END |
| 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 |
| Part Number | Manufacturer |
|---|---|
| ST3M544N14D PRIMARY | The Boeing Company Div Defense (USA) |
| BCH544N14 | Bristol Industries, Llc (USA) |
| CH50063-3-14 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| CN171-4-14 | 5/2 Secondary reference U.S. Government activity |
NSN 9540-01-494-7421 is a Channel,structural, manufactured by The Boeing Company Div Defense, classified under FSC 9540, Structural Shapes, Nonferrous Base Metal. Status: active.
NSN 9540-01-494-7421 has 3 manufacturer part numbers on file: ST3M544N14D (The Boeing Company Div Defense), BCH544N14 (Bristol Industries, Llc), CH50063-3-14 (Howmet Global Fastening Systems Inc).
Key specifications for ST3M544N14D: Length: 72.000 INCHES NOMINAL IN; Base Flange Thickness: 0.080 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN; Left Side Flange Height: 0.298 INCHES MAXIMUM IN; Fillet Radius Where Right Flange Joins Base Flange: 0.020 INCHES MAXIMUM IN. 14 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.