5/16 - 24 X 1 1/4+ (1.303) 12 point double hex head aircraft bolts. No specs on the alloy, but their weight is consistent with other stainless bolts I have, and they are non-magnetic.
Mishimoto MMHP-GRB-2424 Gold Reflective Barrier w/ Adhesive, 24" x 24"
RCI 7509A Fuel Cell Mounting Kit, 20 Gallon - 24" x 20" x 10"
SHURTRAX 10036 Auto/SUV Traction Aid Up to 100 lb 36 x 24 x 3 in Vinyl Black
Universal Twin Turbo Intercooler 24"x 9"x 3.5" Bar & Plate Custom (2 In/1 Out)
10pcs Copper Washer Flat Sealing Gasket Ring Spacer for Car 16 x 24 x 1.5mm
12 NASCAR A-1 TECHNOLOGIES ENGINE STUDS 3/8"-16 x 5/16"-24 x 4.315" LONG ARP
