Hargrave's patent 1888 stepped locknut and washer

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Hargrave's patent 1888 stepped locknut and washer; example 7/8
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Hargrave's patent 1888 stepped locknut and washer; example 7/8" diam. and bolt.

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Category:: Motive Power

Object Number:: 1889-100

credit:: Patent Rivet Co.

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Hargrave's patent 1888 stepped locknut and washer

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