A rubber O-ring to eliminate loosening while surfing. Fits all standard fin boxes in the market. Stainless steel construction, rust and corrosion resistant. Material: Stainless Steel. It's just take you 1 minute.
eBay
KEDEAN Underwater Thruster Electric Fin Motor for Fishing SUP Paddle Board Surfboard POWER FIN Remote Control Kayak Thruster
Aliexpress UK
Compatible with surfboard, and other surfboard, fin, paddleboard and more. Adopts a professional design process, sturdy for lasting use.Thissurfboard fin screw is d esigned and manufactured for paddleboard.
eBay
SUP Fin New Style Stand Up/Paddle/Inflatable Board Surfboard Central Fin Water Sport
Aliexpress UK
Fits all standard fin boxes on the market. 316 stainless steel construction, anti-rust and corrosion-resistant. Material: 316 stainless steel. Due to various factors such as monitor brightness, light brightness.
eBay
AQUA MARINA BLUEDRIVE X PRO POWER FIN 12V Battery electric motor SUP Stand Up Paddle Board push Surf Kayak surfboard
Aliexpress UK
Suitable for standard surfboard tail box. 1 x Spring Screw. Made of stainless steel, durability and functional. Material: Stainless steel. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.
eBay
HOMCOM Inflatable Stand Up Paddle Board, 10' x 30" x 4", Non-Slip SUP, with ISUP Accessories, Hand Pump, 3 Fins, Adj Paddle
Aliexpress UK
Compatible: Fit most single fin board like, SUP, longboard and paddleboard. 1 Fin Screws. 1 Screws with Plate. No tool needed: Tighten the screws against the rubber ring easily with your hands. Size:32 4mm.
eBay
1pc Quick Snap Set Fin Lock Stainless Steel Screws Surfing For Box Center Fins Surfboard Fins Standard Longboard Quick Snap Set
Aliexpress UK
The stainless steel screw forpaddle board fin fits most surfboard fin boxes for paddleboard. - Paddle board fin screw is easy to install and not easy to loosen, designed for extended durability and tight.
eBay
KEDEAN Electric Fish Fins for Tabla Paddle Surf Stand Up Paddle Board Propulsion Underwater Motor with Battery Kayak Propeller
Aliexpress UK
Fits all standard fin boxes on the market. Rubber O-rings eliminate looseness while surfing. 316 stainless steel construction, anti-rust and corrosion-resistant. Material: 316 stainless steel. Due to various factors such as monitor brightness, light brightness.
eBay
7/8/9/10'' Single Center Fin with 1 No Tool Fin Screw Fiberglass Reinforeced SUP Replacement Fins for Surfboard Longboard
Aliexpress UK
Fits all standard fin boxes on the market. 316 stainless steel construction, anti-rust and corrosion-resistant. Material: 316 stainless steel. Due to various factors such as monitor brightness, light brightness.
eBay
Stainless Surf Thumb Fin Screw Plate Surfboard Surf Longboard SUP Fin Screws
Aliexpress UK