The Adapter Assembly,valve, cataloged under National Stock Number 1660-00-600-3945, 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-00-600-3945 |
| Primary Part Number | 135563-1 |
| Item Name | Adapter Assembly,valve |
| 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-591 COMP 2;1.560 IN. LG;5.580 IN. OD EXCLUDING EARS;SIX LEGS;SIX 0.138-32 NC-2B THD MTG HOLES LOCATED IN EARS ON 5.625 IN. DIA BOLT CIRCLE;CHROMATE MIL-C-5541 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 |
|---|---|
| 135563-1 PRIMARY | Honeywell International, Inc Div Aerospace-Tucson (USA) |
| Reference | Meaning |
|---|---|
| 10300517 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 135563-1 | 5/9 Secondary reference Alliedsignal Inc Dba Allied-Signal Aerospace Co |
| 135563-1 | 5/9 Secondary reference Honeywell International Inc. Div Aerospace - Torrance |
NSN 1660-00-600-3945 is a Adapter Assembly,valve, manufactured by Honeywell International, Inc Div Aerospace-Tucson, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-00-600-3945 has 1 manufacturer part number on file: 135563-1 (Honeywell International, Inc Div Aerospace-Tucson).
1 possible match (shared part number, not a government interchangeability claim): 2510-01-515-4389. Verify interchangeability with system specifications before substitution.
Key specifications for 135563-1: General Characteristics Item Description: ALUMINUM ALLOY QQ-A-591 COMP 2;1.560 IN. LG;5.580 IN. OD EXCLUDING EARS;SIX LEGS;SIX 0.138-32 NC-2B THD MTG HOLES LOCATED IN EARS ON 5.625 IN. DIA BOLT CIRCLE;CHROMATE MIL-C-5541 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 1660-00-600-3945 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.