Stainless Steel Spur Gear - P/N: SM-B-178920 (NOS)

Description

Genuine U.S. Military Issue Surplus
Stainless Steel Spur Gear - P/N: SM-B-178920 (NOS)
(NOS) = New Old Stock
P/N: SM-B-178920
We are not sure who manufactured this part, we came up with the following....
General Dynamics C4 Systems Inc.
P/N:   344B383
Motorola Inc.
P/N:   344B383
NSN: 3020-00-671-5831
Characteristics
Body Style: Plain, solid
Pitch Diameter: 1.6250 inches nominal
Teeth Quantity: 52
Backlash Designation: Grade B
Nominal Outside Diameter: 1.688 inches
Tooth Form: Standard
Pressure Angle: 20.0000 degrees
Face Nominal Width: 0.050 inches
Bore Nominal Diameter: 0.313 inches both ends
Surface Treatment: Passivate overall
Style Designator: Hubless
The overall size of the  Spur Gear  is approximately 1/16" x 1 11/16” Outer Diameter
5/16”  Inner Diameter
(See Pictures)
There are two slots in the Spur Gear,  they are approximately 9/16”x 3/16”
Beside the two slots, there is a tiny hole by which is approximately 1/16” Inner Diameter
(See Pictures)
Made of Stainless Steel.
But there is a slight magnetic pull.
Weight: 0.3 Oz.
Similar to the one in the pictures.
Unused!
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(Ea - C)
(MJ - 7438)
(R1S SNE L5)