The Bellows,transducer, cataloged under National Stock Number 2915-01-157-8656, is classified within Federal Supply Class 2915 (Engine Fuel System Components, Aircraft and Missile Prime Movers) of the Engine Accessories group. The manufacturer of record is Unison Industries Llc. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2915-01-157-8656 |
| Primary Part Number | CG14639 |
| Item Name | Bellows,transducer |
| FSC / FSG | 2915 / 29 — Engine Fuel System Components, Aircraft and Missile Prime Movers |
| Manufacturer | Unison Industries Llc |
| Status | ACTIVE |
| FSC Application Data | FUEL CONTROL AFTERBURNER |
| Overall Diameter | 0.871 INCHES MINIMUM AND 0.873 INCHES MAXIMUM IN |
| General Characteristics Item Description | TOTAL SPRING RATE OF MATCHED BELLOWS TO BE 90LBS PER INCH LBS |
| Special Test Features | NATURAL FREQUENCY OF BOTH BELLOWS TO BE GREATER THAN 270 HERTZ; MAXIMUM TEMPERATURE: 400 DEGREES FAHRENHEIT |
| Supplementary Features | TOP DIAMETER: .812" MAXIMUM |
| Functional Description | BELLOWS SHALL BE MANUFACTURE FROM AMS 5589 OR AMS 5590; AFTER FORMING, THE BELLOWS SHALL BE HEAT TREATED AS FOLLOWS: AGE AT 1325 DEGREES FAHRENHEIT FOR 8 HOURS MINIMUM; FURNACE COOL TO 1150 DEGREES FAHRENHEIT WITHIN 45-75 MINUTES; HOLD AT 1150 DEGREES FAHRENHEIT FOR 8 HOURS MINIMUM; FURNACE COOL GRAIN SIZE ASTM 6 MINUTES |
| Material | NICKEL ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| CG14639 PRIMARY | Unison Industries Llc (USA) |
| Reference | Meaning |
|---|---|
| 10159077 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| CG14639 | 5/9 Secondary reference U.S. Government activity |
| 5030T55P01 | 1/2 Source control — Government-approved source U.S. Government activity |
| CG14639 | 3/9 Design control — primary reference U.S. Government activity |
NSN 2915-01-157-8656 is a Bellows,transducer, manufactured by Unison Industries Llc, classified under FSC 2915, Engine Fuel System Components, Aircraft and Missile Prime Movers. Status: active.
NSN 2915-01-157-8656 has 1 manufacturer part number on file: CG14639 (Unison Industries Llc).
Key specifications for CG14639: FSC Application Data: FUEL CONTROL AFTERBURNER; Overall Diameter: 0.871 INCHES MINIMUM AND 0.873 INCHES MAXIMUM IN; General Characteristics Item Description: TOTAL SPRING RATE OF MATCHED BELLOWS TO BE 90LBS PER INCH LBS; Special Test Features: NATURAL FREQUENCY OF BOTH BELLOWS TO BE GREATER THAN 270 HERTZ; MAXIMUM TEMPERATURE: 400 DEGREES FAHRENHEIT. 7 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 2915-01-157-8656 has DEMIL Code D. 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.