The Bellows,pressure, cataloged under National Stock Number 1660-01-212-2131, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. The manufacturer of record is Fulton Bellows Llc. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Bellows,pressure |
| FSC / FSG | 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment (FSG 16) |
| Manufacturers | Fulton Bellows Llc (CAGE 35XG4); Rtx Corporation Div Pratt & Whitney (CAGE 55820); Senior Operations Llc Dba Metal Bellows Div Metal Bellows (CAGE 07649) |
| Parameter | Value |
|---|---|
| NSN | 1660-01-212-2131 |
| Primary Part Number | 5903940 |
| Item Name | Bellows,pressure |
| FSC / FSG | 1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment |
| Manufacturer | Fulton Bellows Llc |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 5903940 | Fulton Bellows Llc (USA) |
| 5903940 | Rtx Corporation Div Pratt & Whitney (USA) |
| 79668 | Senior Operations Llc Dba Metal Bellows Div Metal Bellows (USA) |
| Reference | Meaning |
|---|---|
| 79668 | 3/9 Design control — primary reference Senior Flexonics Inc |
| 5903940 | 5/2 Secondary reference U.S. Government activity |
NSN 1660-01-212-2131 is a Bellows,pressure, manufactured by Fulton Bellows Llc, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
NSN 1660-01-212-2131 has 3 manufacturer part numbers on file: 5903940 (Fulton Bellows Llc), 5903940 (Rtx Corporation Div Pratt & Whitney), 79668 (Senior Operations Llc Dba Metal Bellows Div Metal Bellows).
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 1660-01-212-2131 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.