The Shaft,shouldered, cataloged under National Stock Number 3040-00-055-1997, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Regal-Beloit Corporation Dba Fasco Group Div Cassville Division. Government technical data includes 17 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. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-055-1997 |
| Primary Part Number | 21795 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Regal-Beloit Corporation Dba Fasco Group Div Cassville Division |
| Status | ACTIVE |
| FSC Application Data | TURBINE AND FAN ASSEMBLY,COOLING SYSTEM,ENGINE,AIRCRAFT |
| Step Quantity | 3 |
| First End Diameter | 0.5620 INCHES NOMINAL IN |
| Second End Diameter | 0.5620 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN |
| Largest Step Diameter | 0.7800 INCHES MINIMUM AND 0.8200 INCHES MAXIMUM IN |
| First End External Thread Length | 0.541 INCHES NOMINAL IN |
| Second End Distance From Keyway Center to End | 1.188 INCHES NOMINAL IN |
| First End Style | CIRCULAR GROOVED AND EXTERNALLY THREADED |
| Second End Keyway Width | 0.0928 INCHES MINIMUM AND 0.0943 INCHES MAXIMUM IN |
| End Similarity | NOT IDENTICAL |
| First End Distance From End to Groove | 0.541 INCHES NOMINAL IN |
| First End Groove Diameter | 0.4700 INCHES NOMINAL IN |
| Second End Style | WOODRUFF KEYWAY AND INTERNALLY THREADED |
| Material | STEEL COMP 4340 |
| First End Groove Width | 0.0940 INCHES NOMINAL IN |
| Second End Internal Thread Length | 0.625 INCHES NOMINAL IN |
| External Keyway Length | 0.151 INCHES NOMINAL SECOND END IN |
| 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 |
|---|---|
| 21795 PRIMARY | Regal-Beloit Corporation Dba Fasco Group Div Cassville Division (USA) |
NSN 3040-00-055-1997 is a Shaft,shouldered, manufactured by Regal-Beloit Corporation Dba Fasco Group Div Cassville Division, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-055-1997 has 1 manufacturer part number on file: 21795 (Regal-Beloit Corporation Dba Fasco Group Div Cassville Division).
7 possible matches (shared part number, not a government interchangeability claim): 1680-00-176-2181, 5930-00-472-3228, 3455-00-580-8495. Verify interchangeability with system specifications before substitution.
Key specifications for 21795: FSC Application Data: TURBINE AND FAN ASSEMBLY,COOLING SYSTEM,ENGINE,AIRCRAFT; Step Quantity: 3; First End Diameter: 0.5620 INCHES NOMINAL IN; Second End Diameter: 0.5620 INCHES MINIMUM AND 0.5625 INCHES MAXIMUM IN. 17 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 3040-00-055-1997 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.