The Regulator,air Pressure,aircraft, cataloged under National Stock Number 1660-01-034-5866, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1660-01-034-5866 |
| Item Name | Regulator,air Pressure,aircraft |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Status | ACTIVE |
| 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 |
| Reference | Meaning |
|---|---|
| 57070 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1660-01-034-5866 is a Regulator,air Pressure,aircraft, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5340-01-660-5980. Verify interchangeability with system specifications before substitution.
Key specifications for 1660-01-034-5866: Special Features: MAJOR COMPONENTS:HOUSING 1,COVER 1,POPPET ASSY 1,CLOSURE 1,AND MISC HARDWARE;MAJOR COMPONENTS MATL ALUM ALLOY,SHIM AND SPRING STEEL;BURST PRESSURE 12.5 PSIG;PROOF PRESSURE 7.5 PSIG AT 90 F (PORM 25 DEG);CRACK PRESSURE 8.5 (PORM 0.5)IN. OF WATER;RESET PRESSURE 0.5 IN. WATER MAX BELOW CRACK PRESSURE;FLOW 55 LBS MIN AT 15.0 IN. OF WATER;OPERATING TEMP RANGE -65 TO 130 DEG F;OPERATING MEDIA AIR LBS; End Item Identification: PRESSURIZING EQUIP,F5F A/C. 0 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 1660-01-034-5866 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.