The Shaft,shouldered, cataloged under National Stock Number 3040-00-920-3606, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Enjet Aero Bloomfield, Llc. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-00-920-3606 |
| Primary Part Number | 491985 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Enjet Aero Bloomfield, Llc |
| Status | ACTIVE |
| FSC Application Data | CONTROL ASSY,PRESSURE RATIO BLEEDACFT ENGINE,2995001398687 743548 |
| Step Quantity | 10 |
| First End Diameter | 0.1900 INCHES MINIMUM AND 0.2100 INCHES MAXIMUM IN |
| Second End Diameter | 0.3270 INCHES MINIMUM AND 0.3310 INCHES MAXIMUM IN |
| Largest Step Diameter | 0.4375 INCHES MINIMUM AND 0.4385 INCHES MAXIMUM IN |
| Second End Spline Minor Diameter | 0.2450 INCHES MINIMUM AND 0.2550 INCHES MAXIMUM IN |
| First End Style | PLAIN |
| Second End Spline Major Diameter | 0.3090 INCHES MINIMUM AND 0.3095 INCHES MAXIMUM IN |
| End Similarity | NOT IDENTICAL |
| Second End Spline Quantity | 14 |
| Second End Pressure Angle | 30.0000 DEGREES NOMINAL |
| Second End Style | SPLINED (INVOLUTE) |
| Material | STEEL |
| Second End Pitch Diameter | 0.2917 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 3040-00-920-3606 is a Shaft,shouldered, manufactured by Enjet Aero Bloomfield, Llc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-920-3606 has 2 manufacturer part numbers on file: 491985 (Enjet Aero Bloomfield, Llc), 491985 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
1 possible match (shared part number, not a government interchangeability claim): 6625-01-326-4255. Verify interchangeability with system specifications before substitution.
Key specifications for 491985: FSC Application Data: CONTROL ASSY,PRESSURE RATIO BLEEDACFT ENGINE,2995001398687 743548; Step Quantity: 10; First End Diameter: 0.1900 INCHES MINIMUM AND 0.2100 INCHES MAXIMUM IN; Second End Diameter: 0.3270 INCHES MINIMUM AND 0.3310 INCHES MAXIMUM IN. 14 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.