The Shaft Assembly,flexible, cataloged under National Stock Number 3040-01-337-6255, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Transdigm Inc. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-337-6255 |
| Primary Part Number | 21X-B-0012 PART 1 |
| Item Name | Shaft Assembly,flexible |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Transdigm Inc |
| Status | ACTIVE |
| Casing Length Between Ferrules | 1.500 INCHES NOMINAL IN |
| Core Removability | NONREMOVABLE |
| Core Overall Length | 2.750 INCHES NOMINAL IN |
| Material | STEEL CASING |
| Casing Outside Diameter | 0.625 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 21X-B-0012 PART 1 PRIMARY | Transdigm Inc (USA) |
| 21X-B-0012-1 | Transdigm Inc (USA) |
| Reference | Meaning |
|---|---|
| 21X-B-0012 | D/9 Drawing number reference only Transdigm Inc |
NSN 3040-01-337-6255 is a Shaft Assembly,flexible, manufactured by Transdigm Inc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-337-6255 has 2 manufacturer part numbers on file: 21X-B-0012 PART 1 (Transdigm Inc), 21X-B-0012-1 (Transdigm Inc).
Key specifications for 21X-B-0012 PART 1: Casing Length Between Ferrules: 1.500 INCHES NOMINAL IN; Core Removability: NONREMOVABLE; Core Overall Length: 2.750 INCHES NOMINAL IN; Material: STEEL CASING. 5 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.
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.