The Cylinder,piston,regulator, cataloged under National Stock Number 1660-00-462-0307, 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 2 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1660-00-462-0307 |
| Item Name | Cylinder,piston,regulator |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Status | ACTIVE |
| FSC Application Data | REGULATOR,ACFT ENVIROMNENTAL SYSTEM,B52 |
| General Characteristics Item Description | ALUMINUM ALLOY,QQ-A-225/6,COMPOSITION 2024 T4,ANODIZED PERMIL-A-8625,TYPE 2,CLASS 2 DYED BLACK,1.795 IN. MIN,1.805 IN. MAX BODYOD,1.875 IN. MIN,1.885 IN. MAX THREADED END OD,1.727 IN. MIN,1.777 IN.MAX L,1.725 IN. MIN,1.735 IN. MAX MAJOR ID,1.695 IN. MIN,1.705 IN. MAXDIA FIRST COUNTERBORE,1.652 IN. MIN,1.662 IN. MAX DIA SECOND COUNTERBORE,1.875-20 UNC-3A THREADS ON ONE END,1.620 IN. MIN,1.640 IN. MAX SMALLESTID,TWO 0.142 IN. MIN,0.162 IN. MAX HOLES DRILLED THROUGH FACE 0.177 IN.MIN,0.197 IN. MAX CENTERLINE RADIUS FROM CENTER OF FACE,FOUR 0.240 IN.MIN,0.260 IN. MAX HOLES EQUALLY SPACED AROUND OD 0.615 IN. MIN,0.635 IN.MAX DISTANCE HOLE CENTERS TO THREADED END,FOUR 0.037 IN. MIN,0.057 IN. MAXHOLES EQUALLY SPACED AROUND OD 0.030 IN. MIN,0.050 IN. MAX DISTANCE FROMFACE A |
| 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 |
|---|---|
| 70888 | 5/9 Secondary reference Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator |
| 70888 | 3/9 Design control — primary reference Vacco Industries |
| 70888 | C/1 Advisory reference — outside the item-of-supply concept Pti Technologies Inc. |
NSN 1660-00-462-0307 is a Cylinder,piston,regulator, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
Key specifications for 1660-00-462-0307: FSC Application Data: REGULATOR,ACFT ENVIROMNENTAL SYSTEM,B52; General Characteristics Item Description: ALUMINUM ALLOY,QQ-A-225/6,COMPOSITION 2024 T4,ANODIZED PERMIL-A-8625,TYPE 2,CLASS 2 DYED BLACK,1.795 IN. MIN,1.805 IN. MAX BODYOD,1.875 IN. MIN,1.885 IN. MAX THREADED END OD,1.727 IN. MIN,1.777 IN.MAX L,1.725 IN. MIN,1.735 IN. MAX MAJOR ID,1.695 IN. MIN,1.705 IN. MAXDIA FIRST COUNTERBORE,1.652 IN. MIN,1.662 IN. MAX DIA SECOND COUNTERBORE,1.875-20 UNC-3A THREADS ON ONE END,1.620 IN. MIN,1.640 IN. MAX SMALLESTID,TWO 0.142 IN. MIN,0.162 IN. MAX HOLES DRILLED THROUGH FACE 0.177 IN.MIN,0.197 IN. MAX CENTERLINE RADIUS FROM CENTER OF FACE,FOUR 0.240 IN.MIN,0.260 IN. MAX HOLES EQUALLY SPACED AROUND OD 0.615 IN. MIN,0.635 IN.MAX DISTANCE HOLE CENTERS TO THREADED END,FOUR 0.037 IN. MIN,0.057 IN. MAXHOLES EQUALLY SPACED AROUND OD 0.030 IN. MIN,0.050 IN. MAX DISTANCE FROMFACE A. 2 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 1660-00-462-0307 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.