The Generator,engine Accessory, cataloged under National Stock Number 2920-01-075-4697, is classified within Federal Supply Class 2920 (Engine Electrical System Components, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Prestolite Electric Inc. Government technical data includes 28 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2920-01-075-4697 |
| Primary Part Number | 90451 |
| Item Name | Generator,engine Accessory |
| FSC / FSG | 2920 / 29 — Engine Electrical System Components, Nonaircraft |
| Manufacturer | Prestolite Electric Inc |
| Status | ACTIVE |
| Distance Between Shaft Center and Bottom Mounting Hole Center | 4.160 INCHES MINIMUM AND 4.220 INCHES MAXIMUM IN |
| Top Mounting Hole Diameter | 0.390 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN |
| Shaft Drive End Style | STRAIGHT SHAFT END, THREADED, W/KEYWAY |
| Grounding Method | EXTERNAL |
| Thread Series | UNF |
| Distance From End to Keyway Center | 1.060 INCHES MINIMUM AND 1.180 INCHES MAXIMUM IN |
| Thread Length | 0.560 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN |
| Bottom Mounting Hole Diameter | 0.624 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN |
| Mounting Style | FLANGE MTD W/THREE MTG HOLES |
| Voltage in Volts | 14.0 |
| Rectifier Location | INTEGRAL |
| Thread Diameter | 0.500 INCHES NOMINAL IN |
| Armature Minimum Speed in RPM at Full Current Output | 4500 |
| Shaft Rotation Direction | CLOCKWISE OR COUNTERCLOCKWISE |
| Thread Direction | RIGHT-HAND |
| Center to Center Distance Between Mounting Holes Along Width | 4.807 INCHES NOMINAL IN |
| Second Step Diameter | 0.669 INCHES NOMINAL IN |
| Keyway Length | 0.750 INCHES NOMINAL IN |
| Maximum Rated Armature Speed in RPM | 12000 |
| Keyway Width | 0.156 INCHES NOMINAL IN |
| Ground Polarity Type | NEGATIVE OR POSITIVE |
| Center to Center Distance Between Top Mounting Slot and Bottom Mounting Hole | 8.320 INCHES MINIMUM AND 8.440 INCHES MAXIMUM IN |
| Thread Quantity Per Inch | 20 |
| Submersibility | NONSUBMERSIBLE |
| Maximum Output Current Rating in Amps | 105.0 |
| Furnished Items | COOLING FAN |
| Unthreaded Portion Length | 0.830 INCHES MINIMUM AND 0.860 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| 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 |
|---|---|
| SAW-10754697 | Southern Automotive Wholesalers, Inc (USA) |
| 90451 PRIMARY | Prestolite Electric Inc (USA) |
| Reference | Meaning |
|---|---|
| 3957523 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| 3957523 | 5/9 Secondary reference Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 |
| 3957523 | 5/9 Secondary reference General Motors Corp Delco Remy Div |
| 7606A90451 | 5/9 Secondary reference Prestolite Electric Inc |
| A001090451 | 5/9 Secondary reference Prestolite Electric Inc |
| 90451 | 5/9 Secondary reference Prestolite Electric Inc |
NSN 2920-01-075-4697 is a Generator,engine Accessory, manufactured by Prestolite Electric Inc, classified under FSC 2920, Engine Electrical System Components, Nonaircraft. Status: active.
NSN 2920-01-075-4697 has 2 manufacturer part numbers on file: SAW-10754697 (Southern Automotive Wholesalers, Inc), 90451 (Prestolite Electric Inc).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-117-4731. Verify interchangeability with system specifications before substitution.
Key specifications for 90451: Distance Between Shaft Center and Bottom Mounting Hole Center: 4.160 INCHES MINIMUM AND 4.220 INCHES MAXIMUM IN; Top Mounting Hole Diameter: 0.390 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN; Shaft Drive End Style: STRAIGHT SHAFT END, THREADED, W/KEYWAY; Grounding Method: EXTERNAL. 28 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.