The Housing,air Outlet,aircraft, cataloged under National Stock Number 1660-01-575-5645, 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 7 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1660-01-575-5645 |
| Primary Part Number | 135860 |
| Item Name | Housing,air Outlet,aircraft |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Honeywell International, Inc Div Aerospace-Tucson |
| Status | ACTIVE |
| Overall Diameter | 5.53 INCHES MINIMUM AND 5.59 INCHES MAXIMUM IN |
| General Characteristics Item Description | HOLE: .345"-.343" DIAMETER THRU, COUNTERSINK 91 DEGREES-89 DEGREES X .375-.365";2 DRILL HOLES, .40-.36" DEEP, COUNTERSINK, TAP 8-32, NC-2B, DEPTH: .27 MIN FULL THD, PER MIL-S-7742; .41-.35" DIAMETER (4 BOSSES) THE SURFACES OF THESE 4 BOSSES MUST LIE IN THE SAME PLANE WITHIN .002" TIR; LETTERS: .030" HIGH (APPROX) CAST RAISED LETTERS |
| Special Test Features | ALL CAST WALL AND WEB THICKNESS: .15-.09"; ALL CAST CORNER RADII: .09-.03"; ALL CAST FILLET RADII: .15-.09" |
| Supplementary Features | MAXIMUM OPERATING PRESSURE: 10PSIG;MAXIMUM OPERATING TEMPERATURE: 165 DEGREES FAHRENHEIT; MAX DRAFT ANGLE: 2 DEGREES |
| Criticality Code Justification | FEAT |
| Surface Treatment | ANODIZE |
| Material | ALUMINUM ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 135860 PRIMARY | Honeywell International, Inc Div Aerospace-Tucson (USA) |
| Reference | Meaning |
|---|---|
| 135860 | 5/9 Secondary reference Honeywell International Inc. Div Aerospace - Torrance |
NSN 1660-01-575-5645 is a Housing,air Outlet,aircraft, manufactured by Honeywell International, Inc Div Aerospace-Tucson, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-575-5645 has 1 manufacturer part number on file: 135860 (Honeywell International, Inc Div Aerospace-Tucson).
1 possible match (shared part number, not a government interchangeability claim): 4720-01-643-3128. Verify interchangeability with system specifications before substitution.
Key specifications for 135860: Overall Diameter: 5.53 INCHES MINIMUM AND 5.59 INCHES MAXIMUM IN; General Characteristics Item Description: HOLE: .345"-.343" DIAMETER THRU, COUNTERSINK 91 DEGREES-89 DEGREES X .375-.365";2 DRILL HOLES, .40-.36" DEEP, COUNTERSINK, TAP 8-32, NC-2B, DEPTH: .27 MIN FULL THD, PER MIL-S-7742; .41-.35" DIAMETER (4 BOSSES) THE SURFACES OF THESE 4 BOSSES MUST LIE IN THE SAME PLANE WITHIN .002" TIR; LETTERS: .030" HIGH (APPROX) CAST RAISED LETTERS; Special Test Features: ALL CAST WALL AND WEB THICKNESS: .15-.09"; ALL CAST CORNER RADII: .09-.03"; ALL CAST FILLET RADII: .15-.09"; Supplementary Features: MAXIMUM OPERATING PRESSURE: 10PSIG;MAXIMUM OPERATING TEMPERATURE: 165 DEGREES FAHRENHEIT; MAX DRAFT ANGLE: 2 DEGREES. 7 specifications are 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 1660-01-575-5645 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.