The Cover,diaphragm, cataloged under National Stock Number 1660-00-421-0421, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. The manufacturer of record is Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road). 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 1660-00-421-0421 |
| Primary Part Number | 883730-1 |
| Item Name | Cover,diaphragm |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) |
| Status | ACTIVE |
| General Characteristics Item Description | ALUM ALLOY PER QQ-A-225/8,COMP 6061-T6 OR QQ-A-225/6,COMP 2024-T4 OR QQ-A-225/3,COMP 2011-T3;HARD ANODIZE PER EMS52401,TY 2,CL A,FSCM 99193;1.000 IN. LG BY 1.000 IN. WD BY 0.260 IN. THK O/A;0.500 IN. ID BY 0.200 IN. DEEP BY 0.125 IN. ID THRU;FOUR 0.147 IN. DIA HOLES THRU ON 1.015 IN. DIA BOLT CIRCLE;0.610 IN. BOSS DIA BY 0.210 IN. 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 |
|---|---|
| 883730-1 PRIMARY | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) (USA) |
| Reference | Meaning |
|---|---|
| 883730-1 | 5/9 Secondary reference U.S. Government activity |
NSN 1660-00-421-0421 is a Cover,diaphragm, manufactured by Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road), classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-00-421-0421 has 1 manufacturer part number on file: 883730-1 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)).
Key specifications for 883730-1: General Characteristics Item Description: ALUM ALLOY PER QQ-A-225/8,COMP 6061-T6 OR QQ-A-225/6,COMP 2024-T4 OR QQ-A-225/3,COMP 2011-T3;HARD ANODIZE PER EMS52401,TY 2,CL A,FSCM 99193;1.000 IN. LG BY 1.000 IN. WD BY 0.260 IN. THK O/A;0.500 IN. ID BY 0.200 IN. DEEP BY 0.125 IN. ID THRU;FOUR 0.147 IN. DIA HOLES THRU ON 1.015 IN. DIA BOLT CIRCLE;0.610 IN. BOSS DIA BY 0.210 IN. LG IN; End Item Identification: 1660-00-760-4141; VALVE. 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 1660-00-421-0421 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.