The Butterfly Shaft, cataloged under National Stock Number 1660-00-012-3531, 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1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1660-00-012-3531 |
| Item Name | Butterfly Shaft |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,2.938 IN. LG,0.250 IN. OD,36 SERRATIONS ONE END,USED ON P/NTA600 VALVE 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 |
|---|---|
| 11281-11 | 3/9 Design control — primary reference Arizona Gear and Mfg Co |
NSN 1660-00-012-3531 is a Butterfly Shaft, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 1680-01-621-4478. Verify interchangeability with system specifications before substitution.
Key specifications for 1660-00-012-3531: General Characteristics Item Description: STEEL,2.938 IN. LG,0.250 IN. OD,36 SERRATIONS ONE END,USED ON P/NTA600 VALVE 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.