The Fitting,refrigerating Unit, cataloged under National Stock Number 1660-00-346-4157, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1660-00-346-4157 |
| Item Name | Fitting,refrigerating Unit |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Status | ACTIVE |
| General Characteristics Item Description | CRES,PASSIVATED,2.125 IN. LG,1.563 IN. W,1.500 IN. THK,0.375 IN. TUBE CONNECTION,USED ON 22701-2 REFRIGERATING UNIT IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 22303-5 | 3/9 Design control — primary reference Triumph Thermal Systems - Maryland, Inc. |
| 22303-5 | C/1 Advisory reference — outside the item-of-supply concept Defense & Development Enterprises Llc |
NSN 1660-00-346-4157 is a Fitting,refrigerating Unit, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6150-00-965-8350. Verify interchangeability with system specifications before substitution.
Key specifications for 1660-00-346-4157: General Characteristics Item Description: CRES,PASSIVATED,2.125 IN. LG,1.563 IN. W,1.500 IN. THK,0.375 IN. TUBE CONNECTION,USED ON 22701-2 REFRIGERATING UNIT 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.
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.