The Shaft,shouldered, cataloged under National Stock Number 3040-00-138-0638, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Curtiss-Wright Flow Control Service, Llc Dba Engineered Arresting Systems - Esco Div Cw Flow Control Svc Llc Dba. Government technical data includes 21 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. 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 | 3040-00-138-0638 |
| Primary Part Number | 71763-1 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Curtiss-Wright Flow Control Service, Llc Dba Engineered Arresting Systems - Esco Div Cw Flow Control Svc Llc Dba |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| Step Quantity | 6 |
| First End Diameter | 0.6240 INCHES NOMINAL IN |
| First End Distance From Keyway Center to End | 0.356 INCHES NOMINAL IN |
| Second End Diameter | 0.8747 INCHES NOMINAL IN |
| Largest Step Diameter | 0.875 INCHES NOMINAL IN |
| Second End Distance From Keyway Center to End | 0.576 INCHES NOMINAL IN |
| First End Style | WOODRUFF KEYWAY AND CIRCULAR GROOVED |
| Second End Keyway Width | 0.1863 INCHES NOMINAL IN |
| Material Document and Classification | QQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE |
| Second End Groove Diameter | 0.8240 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| First End Distance From End to Groove | 0.079 INCHES NOMINAL IN |
| Second End Groove Width | 0.0460 INCHES NOMINAL IN |
| Second End Distance From End to Groove | 0.138 INCHES NOMINAL IN |
| First End Groove Diameter | 0.5910 INCHES NOMINAL IN |
| Second End Style | WOODRUFF KEYWAY AND CIRCULAR GROOVED |
| Material | STEEL COMP 4140 |
| First End Groove Width | 0.0390 INCHES NOMINAL IN |
| External Keyway Length | 0.506 INCHES NOMINAL FIRST END IN |
| First End Keyway Width | 0.1240 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 |
|---|---|
| 71763-1 PRIMARY | Curtiss-Wright Flow Control Service, Llc Dba Engineered Arresting Systems - Esco Div Cw Flow Control Svc Llc Dba (USA) |
NSN 3040-00-138-0638 is a Shaft,shouldered, manufactured by Curtiss-Wright Flow Control Service, Llc Dba Engineered Arresting Systems - Esco Div Cw Flow Control Svc Llc Dba, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-138-0638 has 1 manufacturer part number on file: 71763-1 (Curtiss-Wright Flow Control Service, Llc Dba Engineered Arresting Systems - Esco Div Cw Flow Control Svc Llc Dba).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-488-6193. Verify interchangeability with system specifications before substitution.
Key specifications for 71763-1: Surface Finish: 125.0 MICROINCHES; Step Quantity: 6; First End Diameter: 0.6240 INCHES NOMINAL IN; First End Distance From Keyway Center to End: 0.356 INCHES NOMINAL IN. 21 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.