I googled the patent number and found the following info. The figures on the patent sketches looks slightly different than the piece. Patent number: US 3497806
5 pieces Hex Flange Bolts Clear Zinc Coated Steel $4.99 Flat Shipping Fee for all quantities Needing help with your order? Give us a call at 1-316-300-0833
This listing is for 10 pcs. Zinc Plated 5mm Hex Sems Bolts Captive Washers M5 X .8 Metric Thread Dog Point Car Body Hardware Each bolt is 7/8" long (Bottom of Head to Tip). Comes with 10x Bolts, and 10x captive flat washers These bolts and nuts require an 8mm wrench or socket to tighten.
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