The Cuff,insulation,duct, cataloged under National Stock Number 1560-01-250-6331, 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. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 1560-01-250-6331 |
| Primary Part Number | 7-311A21134-5 |
| Item Name | Cuff,insulation,duct |
| FSC / FSG | 1560 / 15 — Airframe Structural Components |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| General Characteristics Item Description | GLASS FIBER CLOTH,ALUMINIZED,OUTER SURFACE; GLASS FIBER CLOTH,MIL-Y-1140,FABRIC NO. 108,FORM 4,CL C,INNER COVER; ALUMINUM FOIL,QQ-A-1876,HEAT BARRIER; 3.000 IN. LG; 3.620 IN. ID; 0.500 IN. CUT AT HINGE IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 7-311A21134-5 PRIMARY | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| 7-311A21134-5 | 5/9 Secondary reference Mcdonnell Douglas Helicopter Co Inc |
NSN 1560-01-250-6331 is a Cuff,insulation,duct, manufactured by The Boeing Company, classified under FSC 1560, Airframe Structural Components. Status: active.
NSN 1560-01-250-6331 has 1 manufacturer part number on file: 7-311A21134-5 (The Boeing Company).
Key specifications for 7-311A21134-5: General Characteristics Item Description: GLASS FIBER CLOTH,ALUMINIZED,OUTER SURFACE; GLASS FIBER CLOTH,MIL-Y-1140,FABRIC NO. 108,FORM 4,CL C,INNER COVER; ALUMINUM FOIL,QQ-A-1876,HEAT BARRIER; 3.000 IN. LG; 3.620 IN. ID; 0.500 IN. CUT AT HINGE 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.
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.