The Angle,structural, cataloged under National Stock Number 9540-00-251-2620, is classified within Federal Supply Class 9540 (No Item Name Available) of the Metal Bars, Sheets, and Shapes group. The primary manufacturer of record is Alcoa/reynolds Metals Company. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 9 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 9540-00-251-2620 |
| Primary Part Number | 3998 |
| Item Name | Angle,structural |
| FSC / FSG | 9540 / 95 — No Item Name Available |
| Manufacturer | Alcoa/reynolds Metals Company |
| Status | CANCELLED |
| Second Tip Relationship to First Tip | NOT IDENTICAL |
| Weight Per Unit Measure | 1.100 POUNDS PER LINEAR FOOT LBS |
| Material Document and Classification | QQ-A-200/3 FED SPEC 1ST MATERIAL RESPONSE |
| Material | ALUMINUM ALLOY 2024 |
| Nondefinitive Spec/std Data | T4 TEMPER |
| Length | 10.000 FEET MINIMUM AND 12.000 FEET MAXIMUM FT |
| Base Flange Thickness | 0.187 INCHES NOMINAL IN |
| Second Tip Style | UPPER RADIUS |
| Fillet Radius Where Left Flange Joins Base Flange | 0.250 INCHES NOMINAL IN |
| Left Inside Angle | 90.0 DEGREES NOMINAL |
| Basic Shape Style | ANGLE |
| Left Side Flange Thickness | 0.187 INCHES NOMINAL IN |
| Fabrication Method | EXTRUDED |
| First Tip Radius | 0.125 INCHES NOMINAL IN |
| Second Tip Radius | 0.125 INCHES NOMINAL IN |
| Heat Treatment | T-4 SOLUTION HEAT TREATED |
| First Tip Style | RIGHT QUARTER RADIUS |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 3998 | Alcoa/reynolds Metals Company (USA) |
| HA24 | Kaiser Aluminum and Chemical Corp Trentwood Works-Marketing Dept (USA) |
| QQ-A-200/3 | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
| AND10133-2402 | Airforce-Navy Aeronautical Design Standard |
| BAC1503-11175 | The Boeing Company Div Legacy Wichita (USA) |
| DIE77T | Aluminum Co of America (USA) |
| 3998 | Reynolds Metals Co (USA) |
| 50322 | National Distillers and Chemical Corp Bridgeport Brass Co Div (USA) |
| 13257-1 | International Light Metals Corp Sub of Martin Marietta Corp (USA) |
NSN 9540-00-251-2620 is a Angle,structural, manufactured by Alcoa/reynolds Metals Company, classified under FSC 9540 (No Item Name Available). Status: cancelled.
NSN 9540-00-251-2620 has 9 cross-referenced part numbers: 3998 (Alcoa/reynolds Metals Company), HA24 (Kaiser Aluminum and Chemical Corp Trentwood Works-Marketing Dept), QQ-A-200/3 (Federal Specifications Promulgated by General Services Administration Washington DC), AND10133-2402 (Airforce-Navy Aeronautical Design Standard), BAC1503-11175 (The Boeing Company Div Legacy Wichita) and 4 more.
There are 12 known substitutes for 9540-00-251-2620: 5305-00-021-5912, 5977-00-052-4761, 5315-00-076-5756 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 3998: Second Tip Relationship to First Tip: NOT IDENTICAL; Weight Per Unit Measure: 1.100 POUNDS PER LINEAR FOOT LBS; Material Document and Classification: QQ-A-200/3 FED SPEC 1ST MATERIAL RESPONSE; Material: ALUMINUM ALLOY 2024. 19 total characteristics are documented in the Federal Logistics Information System.
NSN 9540-00-251-2620 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.