The Beam,structural, cataloged under National Stock Number 9520-00-277-4404, is classified within Federal Supply Class 9520 (Structural Shapes) of the Metal Bars, Sheets, and Shapes group. Government technical data includes 27 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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 | 9520-00-277-4404 |
| Item Name | Beam,structural |
| FSC / FSG | 9520 / 95 — Structural Shapes |
| Status | ACTIVE |
| Fillet Radius Where Bottom Left Flange Joins Web Flange/leg | 0.750 INCHES NOMINAL IN |
| Length | 30.000 FEET MINIMUM AND 40.000 FEET MAXIMUM FT |
| Left Bottom Inside Angle | 90.0 DEGREES NOMINAL |
| Left Side Top Flange Distance to Center of Both Flanges | 6.000 INCHES NOMINAL IN |
| Web Flange Thickness | 0.625 INCHES NOMINAL IN |
| Fourth Tip Relationship to Preceding Tips | IDENTICAL W/FIRST TIP |
| Right Top Inside Angle | 90.0 DEGREES NOMINAL |
| Left Side Flange Height | 12.000 INCHES NOMINAL IN |
| Left Top Inside Angle | 90.0 DEGREES NOMINAL |
| Fillet Radius Where Top Right Flange Joins Web Flange/leg | 0.750 INCHES NOMINAL IN |
| Material Document and Classification | ASTM A36 ASSN STD 1ST MATERIAL RESPONSE |
| Right Bottom Inside Angle | 90.0 DEGREES NOMINAL |
| Fillet Radius Where Top Left Flange Joins Web Flange/leg | 0.750 INCHES NOMINAL IN |
| Left Side Flange Thickness | 0.940 INCHES NOMINAL IN |
| Basic Shape Style | H SHAPE |
| Right Side Flange Height | 12.000 INCHES NOMINAL IN |
| Weight Per Unit Measure | 150.000 POUNDS PER LINEAR FOOT LBS |
| Right Side Flange Thickness | 0.940 INCHES NOMINAL IN |
| Right Side Bottom Flange Distance to Center of Both Flanges | 6.000 INCHES NOMINAL IN |
| Fillet Radius Where Bottom Right Flange Joins Web Flange/leg | 0.750 INCHES NOMINAL IN |
| Third Tip Relationship to Preceding Tips | IDENTICAL W/FIRST TIP |
| Material | STEEL UNS K02600 |
| Fabrication Method | ROLLED |
| Left Side Bottom Flange Distance to Center of Both Flanges | 6.000 INCHES NOMINAL IN |
| First Tip Style | SQUARE END |
| Second Tip Relationship to First Tip | IDENTICAL |
| Right Side Top Flange Distance to Center of Both Flanges | 6.000 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 |
| Reference | Meaning |
|---|---|
| ASTM A36 | 5/9 Secondary reference U.S. Government activity |
| QQ-S-741 | 5/9 Secondary reference U.S. Government activity |
| ASTM A992 | 3/1 Design control — primary reference U.S. Government activity |
NSN 9520-00-277-4404 is a Beam,structural, classified under FSC 9520, Structural Shapes. Status: active.
5 possible matches (shared part number, not a government interchangeability claim): 9520-00-277-4420, 9520-00-277-4422, 9520-00-277-4424. Verify interchangeability with system specifications before substitution.
Key specifications for 9520-00-277-4404: Fillet Radius Where Bottom Left Flange Joins Web Flange/leg: 0.750 INCHES NOMINAL IN; Length: 30.000 FEET MINIMUM AND 40.000 FEET MAXIMUM FT; Left Bottom Inside Angle: 90.0 DEGREES NOMINAL; Left Side Top Flange Distance to Center of Both Flanges: 6.000 INCHES NOMINAL IN. 27 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.