The Housing,no-Back, cataloged under National Stock Number 1680-01-129-3739, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. The manufacturer of record is Honeywell International Inc. Div Aerospace - Torrance. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 1680-01-129-3739 |
| Primary Part Number | 2040870-1 |
| Item Name | Housing,no-Back |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Manufacturer | Honeywell International Inc. Div Aerospace - Torrance |
| Status | ACTIVE |
| General Characteristics Item Description | AL ALLOY PER QQ-A-225/9,COMPOSITION 7075-T73; ANNODIZE PER MIN-A-8625,TYPE 3,CLASS 1; 2.875 IN. MIN,2.880 IN,MAX SMALLEST ID; 3.145 IN. MIN,3.155 IN. MAX LARGEST ID; 1.324 IN. MIN,1.336 IN. MAX LG IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 2040870-1 PRIMARY | Honeywell International Inc. Div Aerospace - Torrance (USA) |
| Reference | Meaning |
|---|---|
| 10317896 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 1680-01-129-3739 is a Housing,no-Back, manufactured by Honeywell International Inc. Div Aerospace - Torrance, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
NSN 1680-01-129-3739 has 1 manufacturer part number on file: 2040870-1 (Honeywell International Inc. Div Aerospace - Torrance).
Key specifications for 2040870-1: General Characteristics Item Description: AL ALLOY PER QQ-A-225/9,COMPOSITION 7075-T73; ANNODIZE PER MIN-A-8625,TYPE 3,CLASS 1; 2.875 IN. MIN,2.880 IN,MAX SMALLEST ID; 3.145 IN. MIN,3.155 IN. MAX LARGEST ID; 1.324 IN. MIN,1.336 IN. MAX LG IN. 1 specification is 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.
NSN 1680-01-129-3739 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.