The Fairing,tongue, cataloged under National Stock Number 1560-01-239-3727, is classified within Federal Supply Class 1560 (Airframe Structural Components) of the Aircraft and Airframe Components group. The manufacturer of record is Northrop Grumman Systems Corporation. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1560-01-239-3727 |
| Primary Part Number | A51B20637-13 |
| Item Name | Fairing,tongue |
| FSC / FSG | 1560 / 15 — Airframe Structural Components |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM ALLOY,QQ-A-250/4,COMP 2024,T851,EPOXY POLYAMIDE PRIMER,MIL-P-23377; 3.030 IN. LG; 1.600 IN. W; 0.300 IN. THK; ONE END TAPERED,OTHER END SQUARED W/ 0.600 IN. W BY 0.800 IN. LG OPEN ENDED SLOT; BOTH ENDS CHAMFERED IN |
| 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 |
|---|---|
| A51B20637-13 | Howe Machine & Tool Corp. Dba Howe Machine & Tool Corp (USA) |
| A51B20637-13 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| A51B20637-13 | Tens Machine Company, Inc. Dba Tens Machine Co Inc (USA) |
| Reference | Meaning |
|---|---|
| A51B20637-13 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation |
| A51B20637-13 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
NSN 1560-01-239-3727 is a Fairing,tongue, manufactured by Northrop Grumman Systems Corporation, classified under FSC 1560, Airframe Structural Components. Status: active.
NSN 1560-01-239-3727 has 3 manufacturer part numbers on file: A51B20637-13 (Howe Machine & Tool Corp. Dba Howe Machine & Tool Corp), A51B20637-13 (Northrop Grumman Systems Corporation), A51B20637-13 (Tens Machine Company, Inc. Dba Tens Machine Co Inc).
Key specifications for A51B20637-13: General Characteristics Item Description: ALUMINUM ALLOY,QQ-A-250/4,COMP 2024,T851,EPOXY POLYAMIDE PRIMER,MIL-P-23377; 3.030 IN. LG; 1.600 IN. W; 0.300 IN. THK; ONE END TAPERED,OTHER END SQUARED W/ 0.600 IN. W BY 0.800 IN. LG OPEN ENDED SLOT; BOTH ENDS CHAMFERED 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 1560-01-239-3727 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.