Amazon.com: D Shaped Toggle Locking Bolts M20 Steel, D = 8, Pack of 1 K0348.0708201 : Industrial & Scientific
25pcs) DIN 982 M20 Self-Locking Hexagon Nuts, High Type A4 Stainless Steel, Ships Free in USA by Aspen Fasteners, ASSP0982420: Amazon.com: Industrial & Scientific
Amazon.com: The Hillman Group The Hillman Group 1140 Aluminum Hex Nut 1/4-20 in. 34-Pack : Industrial & Scientific
Amazon.com: Brass Tube Flare Fittings,Union Connector Gas Adapter,BrassTube Coupler 3/4 inch Male Flare to 3/4 inch Male Flare 2 Pack : Industrial & Scientific