The Support,regulator, cataloged under National Stock Number 1660-00-804-9199, 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1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-00-804-9199 |
| Item Name | Support,regulator |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Status | ACTIVE |
| General Characteristics Item Description | CRES AMS5643 17-4PH;PASSIVATED;ROCKWELL C 30-36 HARDNESS;0.194 IN. MIN 0.195 IN. MAX LG;0.420 IN. MIN 0.421 IN. MAX FLANGE OD;0.1875 IN. MIN 0.1880 IN. MAX BODY OD;0.053 IN. BORE ID COUNTERBORED 0.125 IN. DIA TO 0.140 IN. DEEP IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 19607 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1660-00-804-9199 is a Support,regulator, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
5 possible matches (shared part number, not a government interchangeability claim): 1680-00-864-1103, 5315-01-050-2945, 5340-01-659-9824. Verify interchangeability with system specifications before substitution.
Key specifications for 1660-00-804-9199: General Characteristics Item Description: CRES AMS5643 17-4PH;PASSIVATED;ROCKWELL C 30-36 HARDNESS;0.194 IN. MIN 0.195 IN. MAX LG;0.420 IN. MIN 0.421 IN. MAX FLANGE OD;0.1875 IN. MIN 0.1880 IN. MAX BODY OD;0.053 IN. BORE ID COUNTERBORED 0.125 IN. DIA TO 0.140 IN. DEEP 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 1660-00-804-9199 has DEMIL Code B. 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.