The Support,structural Component,air, cataloged under National Stock Number 1560-01-286-6505, is classified within Federal Supply Class 1560 (Airframe Structural Components) of the Aircraft and Airframe Components group. The manufacturer of record is Williams Aerospace & Manufacturing Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 1560-01-286-6505 |
| Primary Part Number | 4B39021-105A |
| Item Name | Support,structural Component,air |
| FSC / FSG | 1560 / 15 — Airframe Structural Components |
| Manufacturer | Williams Aerospace & Manufacturing Inc |
| Status | ACTIVE |
| Supplementary Features | FUNCTIONAL DESCRIPTION:STRUT ASSEMBLY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4B39021-105A | Williams Aerospace & Manufacturing Inc (USA) |
| 4B39021-105A | A and M Aerospace, Inc. (USA) |
| 4B39021-105A | Aero Components, Llc (USA) |
| Reference | Meaning |
|---|---|
| 4B39021-105A | 3/2 Design control — primary reference U.S. Government activity |
NSN 1560-01-286-6505 is a Support,structural Component,air, manufactured by Williams Aerospace & Manufacturing Inc, classified under FSC 1560, Airframe Structural Components. Status: active.
NSN 1560-01-286-6505 has 3 manufacturer part numbers on file: 4B39021-105A (Williams Aerospace & Manufacturing Inc), 4B39021-105A (A and M Aerospace, Inc.), 4B39021-105A (Aero Components, Llc).
Key specifications for 4B39021-105A: Supplementary Features: FUNCTIONAL DESCRIPTION:STRUT ASSEMBLY; Special Features: PART OF -101A ADVISORY LIGHT INSTL,FS1470 & FS1724,SCM MOD KIT;SPACE CARGO MODS A; End Item Identification: C-5 AIRCRAFT. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 1560-01-286-6505 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.