8mm Nylon nut used in windsurf bases with 8mm threaded studs to secure US cup bases and older some older style.
Parts - NorthLine - Home of Boardsports & Sport Swap
Magic&shell M8x80 Stud 5PCS M8x80 304 Stainless Steel Double End Thread Screw Bolt: : Industrial & Scientific
ZZZYW M2-M8 Hexagonal Stud PCB Mainboard Male and Female Bracket Spacer Nut Threaded Hollow Column Stainless Steel (Length : 5mm (10pcs), Size : M5 (Thread 8mm)) : Industrial & Scientific
M8 x 25mm T-Slot Drop-in Stud Sliding Bolts T Shape Screws, 304 Stainless Steel 18-8, Full Thread, 20 PCS : Industrial & Scientific
Chinook Rubber Universal Joint with Parts.
Chinook Chinook Rubber Joint with Parts
Feuling 12-Point Engine Exhaust Stud Fastener Kit fits '17-'20 M8 Softail, '99-'17 Twin Cam and '91-'20 Sportster Models
Windsurf Fin Screw Stainless Steel 1/4-20 Thread. Length is measured on the threaded portion (excludes head).
Chinook Fin Screw Stainless Steel 1/4-20 x
M8 Even Thread Stud Class 8.8 Steel - BelMetric
1/2 Sq. Dr. Stud Bolt Setter M8 X 1.25 Length 37mm – Ko-ken USA