The Generator,engine Accessory, cataloged under National Stock Number 2920-01-458-9238, is classified within Federal Supply Class 2920 (Engine Electrical System Components, Nonaircraft) of the Engine Accessories group. The manufacturer of record is C E Niehoff & Co. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2920-01-458-9238 |
| Primary Part Number | N1228-1 |
| Item Name | Generator,engine Accessory |
| FSC / FSG | 2920 / 29 — Engine Electrical System Components, Nonaircraft |
| Manufacturer | C E Niehoff & Co |
| Status | ACTIVE |
| Shaft Drive End Style | STRAIGHT SHAFT END, THREADED, W/KEYWAY |
| Thread Series | UN |
| Distance From End to Keyway Center | 2.350 INCHES NOMINAL IN |
| Thread Length | 0.850 INCHES NOMINAL IN |
| Mounting Style | NO MOUNTING PROVISIONS |
| Voltage in Volts | 28.0 |
| Thread Diameter | 0.3750 INCHES NOMINAL IN |
| Armature Minimum Speed in RPM at Full Current Output | 8000 |
| Shaft Rotation Direction | CLOCKWISE OR COUNTERCLOCKWISE |
| Thread Direction | RIGHT-HAND |
| Second Step Diameter | 0.4375 INCHES NOMINAL IN |
| Keyway Length | 0.780 INCHES NOMINAL IN |
| Keyway Width | 0.1875 INCHES NOMINAL IN |
| Thread Quantity Per Inch | 16 |
| Submersibility | NONSUBMERSIBLE |
| Unthreaded Portion Length | 1.500 INCHES NOMINAL IN |
| Thread Class | 1A A |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 2920-01-458-9238 is a Generator,engine Accessory, manufactured by C E Niehoff & Co, classified under FSC 2920, Engine Electrical System Components, Nonaircraft. Status: active.
NSN 2920-01-458-9238 has 2 manufacturer part numbers on file: 3043161 (Oshkosh Defense Llc), N1228-1 (C E Niehoff & Co).
Key specifications for N1228-1: Shaft Drive End Style: STRAIGHT SHAFT END, THREADED, W/KEYWAY; Thread Series: UN; Distance From End to Keyway Center: 2.350 INCHES NOMINAL IN; Thread Length: 0.850 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.