1/2"-13 x 2 1/4" CARRIAGE BOLTS - GRADE-2 - PLAIN FINISH - LOT OF 25 Pcs. | eBay
2pcs M8x25mm 10.9 Grade Flat Countersunk Head Hex Socket Left Hand Thread Bolt - Walmart.com
Amazon.com: Ganter Standard Elements GN 7379-10-M8-100 ISO 7379-24-M20-100 Fitting Screws with Collar, Silver, ISO 7379-12-M10-70 : Industrial & Scientific
Amazon.com: 2PC Titanium Flange Bolt M8 x 80mm x 1.25mm Allen Hex Cap Head Screw - Hex 10mm : Industrial & Scientific