The Shaft,shouldered, cataloged under National Stock Number 3040-01-284-6154, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Grimes Aerospace Company. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-284-6154 |
| Primary Part Number | A9939-1 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Grimes Aerospace Company |
| Status | ACTIVE |
| Second End External Thread Length | 0.376 INCHES NOMINAL IN |
| Step Quantity | 2 |
| First End Diameter | 0.5000 INCHES NOMINAL IN |
| Second End Diameter | 0.2650 INCHES NOMINAL IN |
| Largest Step Diameter | 0.500 INCHES NOMINAL IN |
| First End Slot Width | 0.265 INCHES NOMINAL IN |
| First End Style | SLOTTED |
| Material Document and Classification | MIL-S-7720 COND A MIL SPEC SINGLE MATERIAL RESPONSE |
| End Similarity | NOT IDENTICAL |
| First End Slot Depth | 1.343 INCHES NOMINAL IN |
| Second End Style | EXTERNAL THREADED |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| A9939-1 PRIMARY | Grimes Aerospace Company (USA) |
| Reference | Meaning |
|---|---|
| A9939 | D/9 Drawing number reference only Grimes Aerospace Company |
NSN 3040-01-284-6154 is a Shaft,shouldered, manufactured by Grimes Aerospace Company, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-284-6154 has 1 manufacturer part number on file: A9939-1 (Grimes Aerospace Company).
Key specifications for A9939-1: Second End External Thread Length: 0.376 INCHES NOMINAL IN; Step Quantity: 2; First End Diameter: 0.5000 INCHES NOMINAL IN; Second End Diameter: 0.2650 INCHES NOMINAL IN. 12 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.