251639C91

View detailed technical data, stock status, and sourcing information for: 251639C91
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Federal Supply Group

Engine Accessories

Federal Supply Classification

2920 Nonaircraft Engine Electrical System Components

National Stock Number

2920-00-999-6572

Item Name Code

17311

Assigment Date

03/09/1966 (60 years ago)

bolt and lockwasher and woodruff key furnished items, right-hand thread direction, 0.781 inches nominal thread length, 0.874 inches nominal second step diameter, 0.156 inches nominal keyway width

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Direction: right-hand
Thread Length: 0.781 inches nominal
Furnished Items: bolt and lockwasher and woodruff key
Second Step Diameter: 0.874 inches nominal
Keyway Width: 0.156 inches nominal
Unthreaded Portion Length: 1.320 inches nominal
Mounting Hole Thread Direction: right-hand
Mounting Style: bracket mtd w/three mtg holes, top hole threaded
Environmental Protection: corrosion resistant
Keyway Length: 0.750 inches nominal
Submersibility: nonsubmersible
Shaft Rotation Direction: clockwise or counterclockwise
Distance From End To Keyway Center: 1.726 inches nominal
Thread Diameter: 0.625 inches nominal
Ground Polarity Type: negative
Maximum Output Current Rating In Amps: 60.0
Grounding Method: internal
Shaft Drive End Style: straight shaft end, threaded, w/keyway
Distance Between Shaft Center And Bottom Mounting Hole Center: 3.740 inches minimum and 3.760 inches maximum
Distance Between Shaft Center And Top Mounting Hole Center: 3.750 inches nominal
Angular Deviation Of First Hole From Top Center In Deg: 0.0
Angular Deviation Of Second Hole From First Hole In Deg: 180.0
Distance Between Inside Surfaces Of Hinge Bracket: 7.180 inches minimum and 7.260 inches maximum
Distance Between Outside Surfaces Of Hinge Bracket: 8.480 inches minimum and 8.560 inches maximum
Bottom Mounting Hole Diameter: 0.451 inches minimum and 0.463 inches maximum
Thread Series: unf
Thread Class: 2a
Mounting Hole Thread Series Designator: unc
Mounting Hole Thread Diameter: 0.375 inches nominal
Mounting Hole Thread Quantity Per Inch: 16
Mounting Hole Thread Class: 2b
Thread Quantity Per Inch: 18
Voltage In Volts: 24.0

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
1117096	Engine Accessory Generator
251639C91	Engine Accessory Generator
63A124F8022	Engine Accessory Generator

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 2920-00-999-6572?

The FSCG of the NSN 2920-00-999-6572 is 2920

Does the NSN 2920-00-999-6572 have a Schedule B code assigned?

Yes, the Schedule B code is 8511500000

Does NSN 2920-00-999-6572 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 2920-00-999-6572 contain precious materials?

Precious metal content is unknown

Does NSN 2920-00-999-6572 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 2920-00-999-6572 was assigned to the Federal Catalog?

It was assigned 60 years ago, on Wed, Mar 9, 1966