Carriage bolt DIN 603 with nut DIN 934 Metric screw, Half round head, M 10 x 150, Partial thread, Steel, zinc plated, blue passivated, 25 Pcs., 4005674200059 - REISSER Schraubentechnik
Everbilt 1/4 in.-20 x 3/4 in. Combo Round Head Stainless Steel Machine Screw (2-Pack) 814481 - The Home Depot
Round Head Low Shoulder Carriage Bolts And Nuts (3/8 -16) QTY 4 Each | eBay
Slotted Round Nut Stainless DIN 546 - BelMetric
Maintenance free bolted joints with IHF fasteners | ITH
Sets of Round Nuts and Screws - Winn Manufacturing