The Base Assembly,regulator, cataloged under National Stock Number 1660-01-054-9877, 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 Div Aerospace-Tucson. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-01-054-9877 |
| Primary Part Number | 139375-1 |
| Item Name | Base Assembly,regulator |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Honeywell International, Inc Div Aerospace-Tucson |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM ALLOY QQ-A-601 356-T6,ANODIZE MIL-A-8625 TYPE I,5.125 IN. DIA B. C.,2.025 IN. MAX 1.995 IN. MIN H,6 HOLES 0.220 IN. MAX 0.210 IN. MIN DIA THRU 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 | F |
| Part Number | Manufacturer |
|---|---|
| 139375-1 | Honeywell International Inc. Div Aerospace - Torrance (USA) |
| 139375-1 PRIMARY | Honeywell International, Inc Div Aerospace-Tucson (USA) |
| 139375-1 | Honeywell International Inc. Dba Honeywell International (USA) |
| 139375-1 | The Boeing Company Div Defense (USA) |
NSN 1660-01-054-9877 is a Base Assembly,regulator, manufactured by Honeywell International, Inc Div Aerospace-Tucson, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-054-9877 has 4 manufacturer part numbers on file: 139375-1 (Honeywell International Inc. Div Aerospace - Torrance), 139375-1 (Honeywell International, Inc Div Aerospace-Tucson), 139375-1 (Honeywell International Inc. Dba Honeywell International), 139375-1 (The Boeing Company Div Defense).
Key specifications for 139375-1: General Characteristics Item Description: ALUMINUM ALLOY QQ-A-601 356-T6,ANODIZE MIL-A-8625 TYPE I,5.125 IN. DIA B. C.,2.025 IN. MAX 1.995 IN. MIN H,6 HOLES 0.220 IN. MAX 0.210 IN. MIN DIA THRU IN; End Item Identification: ACFT F16. 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 1660-01-054-9877 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.