The Seal Block,door Assembly, cataloged under National Stock Number 1560-01-028-7998, is classified within Federal Supply Class 1560 (Airframe Structural Components) of the Aircraft and Airframe Components group. The manufacturer of record is The Boeing Company Div Defense. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 1560-01-028-7998 |
| Primary Part Number | 53-32021-11 |
| Item Name | Seal Block,door Assembly |
| FSC / FSG | 1560 / 15 — Airframe Structural Components |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM QQ-A-355 COMP 2024-T3 8.70 IN. LG,0.960 IN. W,0.500 IN. THK IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 53-32021-11 PRIMARY | The Boeing Company Div Defense (USA) |
| 53-32021-11 | Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company (USA) |
| 53-32021-11 | Kitco Llc (USA) |
| Reference | Meaning |
|---|---|
| 53-32021-11 | 5/9 Secondary reference Cell Wireless Corporation |
NSN 1560-01-028-7998 is a Seal Block,door Assembly, manufactured by The Boeing Company Div Defense, classified under FSC 1560, Airframe Structural Components. Status: active.
NSN 1560-01-028-7998 has 3 manufacturer part numbers on file: 53-32021-11 (The Boeing Company Div Defense), 53-32021-11 (Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company), 53-32021-11 (Kitco Llc).
Key specifications for 53-32021-11: General Characteristics Item Description: ALUMINUM QQ-A-355 COMP 2024-T3 8.70 IN. LG,0.960 IN. W,0.500 IN. THK IN. 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 1560-01-028-7998 has DEMIL Code B. 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.