Go! Menu Boards Shop By Brand Exocet Naish Quatro Simmer Tabou Shop By Type Wave - Freemove Freeride- Slalom Wind Foil View All Sails Shop By Brand Aerotech Naish Simmer XO Sails Shop By Type Beginners & Kids Freeride & Slalom Wave & Freestyle Wind Foil View All Accessories Shop By Type Bases & Extensions Boom Heads & Accessories Clothing Equipment Bags Fins Footstraps & Traction Helmet Harness Harness Lines Impact Vests Roof Straps & Pads Shoes & Boots Tools - Parts - Repair Uphaul Booms Shop By Brand Aeron Naish Simmer Streamlined Boom XO Shop By Type Aluminium Carbon Beginners & Kids View All Masts Shop By Brand Epic Gear Naish Simmer View All Shop By Type Beginners & Kids RDM 30%-60% RDM 70%-100% SDM 30%-60% SDM 70%-100% Foil Foils Exocet Simmer Slingshot ALUMINUM CARBON Foil Parts Bags Fuselages Hardware Leashes Masts Pumps Wings Sale Windsurfing Boards Booms Masts Sails Others Toggle navigation LOOPEE Sports LLC FREE SHIPPING On Eligible Orders Over $199* MY ACCOUNT MY CART CHECKOUT LOG IN Boards Shop By Brand Exocet Naish Quatro Simmer Tabou Shop By Type Wave - Freemove Freeride- Slalom Wind Foil View All Sails Shop By Brand Aerotech Naish Simmer XO Sails Shop By Type Beginners & Kids Freeride & Slalom Wave & Freestyle Wind Foil View All Accessories Shop By Type Bases & Extensions Boom Heads & Accessories Clothing Equipment Bags Fins Footstraps & Traction Helmet Harness Harness Lines Impact Vests Roof Straps & Pads Shoes & Boots Tools - Parts - Repair Uphaul Booms Shop By Brand Aeron Naish Simmer Streamlined Boom XO Shop By Type Aluminium Carbon Beginners & Kids View All Masts Shop By Brand Epic Gear Naish Simmer View All Shop By Type Beginners & Kids RDM 30%-60% RDM 70%-100% SDM 30%-60% SDM 70%-100% Foil Foils Exocet Simmer Slingshot ALUMINUM CARBON Foil Parts Bags Fuselages Hardware Leashes Masts Pumps Wings Sale Windsurfing Boards Booms Masts Sails Others MENU Open menu ALL CATEGORIES WINDSURFING Accessories Bases - Extensions & Parts Boom Heads & Accessories Clothing Equipment Bags Fins Footstraps & Traction Helmets Harness Harness Lines Impact Vests Roof Straps & Pads Tools - Parts - Repair UpHaul Wind Meter Boards Exocet Quatro Simmer Tabou Wave - Freemove Freeride- Slalom Booms Aeron Epic Gear Naish Simmer Streamlined Boom Aluminium Carbon Beginners & Kids Masts Epic Gear Naish Simmer Beginners & Kids RDM 40%-60% RDM 80%-100% SDM 30%-60% SDM 70%-100% Sails Aerotech Naish Simmer Beginners & Kids Wave & Freestyle Freeride & Slalom WINDFOIL Foil Boards Compatible Boards Foil Boards Hydrofoils Windsurf Foils Foil Parts Foil Hardware Foil Masts Foil Wings SALE Boards Booms Masts Sails Others Nav Menu 4 Nav Menu 5 Nav Menu 6 Nav Menu 7 Nav Menu 8 Home > Accessories > Shop By Type > Bases & Extensions > Fin screw 1/4 x 20 Alternative Views: Our Price: $0.90 Availability: In Stock Fin screw: 1" 1.5" [Add $0.10] 2" [Add $0.20] 2.5" [Add $0.30] 3" [Add $0.40] 3.5" [Add $0.50] 4" [Add $0.60] Qty: Description Fin screw 1/4 x 20 Grade A Stainless Steel. Related Items Fin screw 6mm Chinook Universal rubber Joint Flex RDM Windsurf Mast Extension Collar and Pin Streamlined Twist On Mast Bases - US Base cup (Single Bolt) Our Price: $1.20 Our Price: $24.00 Our Price: $14.00 Our Price: $99.00 Streamlined Twist On Mast Bases - Euro Pin Streamlined Quick-Lock Plate Only Streamlined Extension Collar And Pin RDM & STD T-Nut Channel Insert 8mm Our Price: $99.00 Our Price: $55.00 Our Price: $18.00 Our Price: $4.00