The Angle,structural, cataloged under National Stock Number 9540-00-905-3953, 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 Kaiser Aluminum and Chemical Corp Trentwood Works-Marketing Dept. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 9540-00-905-3953 |
| Primary Part Number | H5657 |
| Item Name | Angle,structural |
| FSC / FSG | 9540 / 95 — Structural Shapes, Nonferrous Base Metal |
| Manufacturer | Kaiser Aluminum and Chemical Corp Trentwood Works-Marketing Dept |
| Status | ACTIVE |
| 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 |
|---|---|
| H5657 PRIMARY | Kaiser Aluminum and Chemical Corp Trentwood Works-Marketing Dept (USA) |
| 1M2526 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| H5657 | 5/9 Secondary reference U.S. Government activity |
| QQA200-3 | 4/1 Identification reference U.S. Government activity |
NSN 9540-00-905-3953 is a Angle,structural, manufactured by Kaiser Aluminum and Chemical Corp Trentwood Works-Marketing Dept, classified under FSC 9540, Structural Shapes, Nonferrous Base Metal. Status: active.
NSN 9540-00-905-3953 has 2 manufacturer part numbers on file: H5657 (Kaiser Aluminum and Chemical Corp Trentwood Works-Marketing Dept), 1M2526 (The Boeing Company Div Defense).
1 possible match (shared part number, not a government interchangeability claim): 8030-01-549-8251. Verify interchangeability with system specifications before substitution.
Key specifications for H5657: Special Features: ORIGINAL NAME: STRUCTURAL ANGLE. 0 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.