The Worm Shaft, cataloged under National Stock Number 3040-00-973-6847, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Ametek, Inc. Div Aerospace & Defense. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-973-6847 |
| Primary Part Number | AH4556 |
| Item Name | Worm Shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Ametek, Inc. Div Aerospace & Defense |
| Status | ACTIVE |
| Shaft Location | BOTH ENDS OF WORM |
| Worm Body Length | 0.475 INCHES NOMINAL IN |
| Worm Thread Lead | 0.150 INCHES NOMINAL IN |
| Material Document and Classification | AISI 416 ASSN STD SINGLE MATERIAL RESPONSE |
| Worm Pitch Diameter | 0.1003 INCHES NOMINAL IN |
| Worm Outside Diameter | 0.119 INCHES NOMINAL IN |
| Straight Unthreaded Section Diameter | 0.063 INCHES NOMINAL FIRST END FIRST PORTION IN |
| End Similarity | NOT IDENTICAL |
| Surface Treatment | NICKEL |
| Worm Thread Section Length | 0.343 INCHES NOMINAL IN |
| Worm Helix Angle | 29 DEG MIN |
| Material | STEEL COMP 416 |
| Worm Thread Quantity | 1 |
| Worm Thread Direction | RIGHT-HAND |
| Worm Pressure Angle in Deg | 29.000 |
| Worm Body Tapered Bearing Surface End | NOT PROVIDED |
| Straight Unthreaded Length | 0.080 INCHES NOMINAL FIRST END FIRST PORTION 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 |
|---|---|
| AH4556 PRIMARY | Ametek, Inc. Div Aerospace & Defense (USA) |
NSN 3040-00-973-6847 is a Worm Shaft, manufactured by Ametek, Inc. Div Aerospace & Defense, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-973-6847 has 1 manufacturer part number on file: AH4556 (Ametek, Inc. Div Aerospace & Defense).
Key specifications for AH4556: Shaft Location: BOTH ENDS OF WORM; Worm Body Length: 0.475 INCHES NOMINAL IN; Worm Thread Lead: 0.150 INCHES NOMINAL IN; Material Document and Classification: AISI 416 ASSN STD SINGLE MATERIAL RESPONSE. 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.