The Worm Shaft, cataloged under National Stock Number 3040-01-185-2533, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Dynalec Corporation. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3040-01-185-2533 |
| Primary Part Number | K1684 |
| Item Name | Worm Shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Dynalec Corporation |
| Status | ACTIVE |
| Shaft Location | BOTH ENDS OF WORM |
| Worm Body Length | 3.250 INCHES NOMINAL IN |
| Worm Thread Lead | 0.314 INCHES NOMINAL IN |
| Worm Pitch Diameter | 0.875 INCHES NOMINAL IN |
| Worm Outside Diameter | 0.979 INCHES NOMINAL IN |
| Straight Unthreaded Section Diameter | 0.625 INCHES NOMINAL SECOND END IN |
| Straight Unthreaded Section Diameter | 0.670 INCHES NOMINAL FIRST END IN |
| End Similarity | NOT IDENTICAL |
| Worm Thread Section Length | 2.000 INCHES NOMINAL IN |
| Worm Helix Angle | 9 DEG 5 MIN |
| Material | STEEL |
| Worm Thread Quantity | 2 |
| Worm Thread Direction | RIGHT-HAND |
| Worm Pressure Angle in Deg | 14.500 |
| Worm Body Tapered Bearing Surface End | NOT PROVIDED |
| Straight Unthreaded Length | 0.500 INCHES NOMINAL FIRST END IN |
| Straight Unthreaded Length | 2.000 INCHES NOMINAL SECOND END 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 |
|---|---|
| K1684 PRIMARY | Dynalec Corporation (USA) |
| Reference | Meaning |
|---|---|
| K1684 | 5/9 Secondary reference The Electric Tachometer Corp. |
NSN 3040-01-185-2533 is a Worm Shaft, manufactured by Dynalec Corporation, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-185-2533 has 1 manufacturer part number on file: K1684 (Dynalec Corporation).
Key specifications for K1684: Shaft Location: BOTH ENDS OF WORM; Worm Body Length: 3.250 INCHES NOMINAL IN; Worm Thread Lead: 0.314 INCHES NOMINAL IN; Overall Length: 9.875 INCHES NOMINAL IN. 17 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.