The Generator,engine Accessory, cataloged under National Stock Number 2920-01-657-5989, 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 13 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 | 2920-01-657-5989 |
| Primary Part Number | N1609-3 |
| 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 |
| Distance Between Outside Surfaces of Hinge Bracket | 15.6 INCHES NOMINAL IN |
| Grounding Method | EXTERNAL |
| Distance Between Inside Surfaces of Hinge Bracket | 6.62 INCHES NOMINAL IN |
| Thread Length | 0.96 INCHES NOMINAL IN |
| Mounting Style | BRACKET MTD W/THREE MTG HOLES |
| Voltage in Volts | 28.0 |
| Second Step Diameter | 1.177 INCHES MINIMUM AND 1.179 INCHES MAXIMUM IN |
| Maximum Rated Armature Speed in RPM | 8500 |
| Ground Polarity Type | NEGATIVE |
| Maximum Output Current Rating in Amps | 570.0 |
| Furnished Items | WOODRUFF KEY |
| Unthreaded Portion Length | 1.77 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 2920-01-657-5989 is a Generator,engine Accessory, manufactured by C E Niehoff & Co, classified under FSC 2920, Engine Electrical System Components, Nonaircraft. Status: active.
NSN 2920-01-657-5989 has 2 manufacturer part numbers on file: N1609-3 (C E Niehoff & Co), 3846374 (Oshkosh Defense Llc).
Key specifications for N1609-3: Shaft Drive End Style: STRAIGHT SHAFT END, THREADED, W/KEYWAY; Distance Between Outside Surfaces of Hinge Bracket: 15.6 INCHES NOMINAL IN; Grounding Method: EXTERNAL; Distance Between Inside Surfaces of Hinge Bracket: 6.62 INCHES NOMINAL IN. 13 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.