The Shaft,shouldered, cataloged under National Stock Number 3040-00-099-0079, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is L3harris Technologies, Inc Div Space & Airborne Systems. Government technical data includes 19 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-00-099-0079 |
| Primary Part Number | 40638 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | L3harris Technologies, Inc Div Space & Airborne Systems |
| Status | ACTIVE |
| FSC Application Data | RADAR EQUIPMENT,EXCEPT AIRBORNE |
| Step Quantity | 8 |
| First End Diameter | 0.5860 INCHES NOMINAL IN |
| First End Distance From Keyway Center to End | 0.313 INCHES NOMINAL IN |
| Second End Diameter | 0.7486 INCHES MINIMUM AND 0.7493 INCHES MAXIMUM IN |
| Largest Step Diameter | 1.125 INCHES NOMINAL IN |
| First End External Thread Length | 0.625 INCHES NOMINAL IN |
| First End Style | EXTERNALLY THREADED AND INDENTED FLAT KEYWAY |
| Second End Keyway Width | 0.1250 INCHES NOMINAL IN |
| Material Document and Classification | 17-4PH CRES MFR REF SINGLE MATERIAL RESPONSE |
| First End Keyway Depth | 0.094 INCHES NOMINAL IN |
| Second End Keyway Depth | 0.062 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | FLAT KEYWAYS AND INTERNALLY THREADED |
| Material | STEEL |
| Second End Internal Thread Length | 1.250 INCHES NOMINAL IN |
| External Keyway Length | 0.625 INCHES NOMINAL SECOND END IN |
| External Keyway Length | 0.625 INCHES NOMINAL FIRST END IN |
| First End Keyway Width | 0.1250 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 |
| Part Number | Manufacturer |
|---|---|
| 40638 | Perez Machine, Inc. Dba Perez Machine Inc (USA) |
| 40638 PRIMARY | L3harris Technologies, Inc Div Space & Airborne Systems (USA) |
| Reference | Meaning |
|---|---|
| 40638 | 5/9 Secondary reference Briggs Technologies Inc |
| 40638 | 5/9 Secondary reference 3dbm Co Inc |
| 40638 | 5/9 Secondary reference Valcore Manufacturing Llc |
NSN 3040-00-099-0079 is a Shaft,shouldered, manufactured by L3harris Technologies, Inc Div Space & Airborne Systems, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-099-0079 has 2 manufacturer part numbers on file: 40638 (Perez Machine, Inc. Dba Perez Machine Inc), 40638 (L3harris Technologies, Inc Div Space & Airborne Systems).
4 possible matches (shared part number, not a government interchangeability claim): 6105-00-116-4735, 5950-00-949-4962, 5306-01-434-1797. Verify interchangeability with system specifications before substitution.
Key specifications for 40638: FSC Application Data: RADAR EQUIPMENT,EXCEPT AIRBORNE; Step Quantity: 8; First End Diameter: 0.5860 INCHES NOMINAL IN; First End Distance From Keyway Center to End: 0.313 INCHES NOMINAL IN. 19 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.