The Nut,coupling,flexible Casing, cataloged under National Stock Number 3040-00-693-5012, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 6 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-693-5012 |
| Primary Part Number | 855811 |
| Item Name | Nut,coupling,flexible Casing |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Thread Length | 0.438 INCHES NOMINAL IN |
| Outside Diameter | 0.718 INCHES NOMINAL IN |
| Seat End Inside Diameter | 0.390 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Thread Size | 5/8 IN.-24 IN |
| Screw Thread Series Designator | UNEF |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 3040-00-693-5012 is a Nut,coupling,flexible Casing, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-693-5012 has 2 manufacturer part numbers on file: 855811 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 855811 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 855811: Thread Length: 0.438 INCHES NOMINAL IN; Overall Length: 0.500 INCHES NOMINAL IN; Outside Diameter: 0.718 INCHES NOMINAL IN; Seat End Inside Diameter: 0.390 INCHES NOMINAL IN. 6 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 3040-00-693-5012 has DEMIL Code B. 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.