400pcs) DIN 982 M8 Self-Locking Hexagon Nuts, High Type A4 Stainless Steel, Ships Free in USA by Aspen Fasteners, ASSP098248: Amazon.com: Industrial & Scientific
FasParts 1/8" NPT Female FPT FIP Pipe Cap Brass Fitting Fuel/Air/Water/Boat/Gas/Oil WOG: Amazon.com: Tools & Home Improvement
300pcs) DIN 6926 M8 Self-Locking Hexagon Flange Nuts with Serration A2 Stainless Steel, Ships Free in USA by Aspen Fasteners, ASSP692628: Amazon.com: Industrial & Scientific