Hydra Fin Shaft, 5/16" US Cut

Hydra Fin Shaft – 5/16" US Cut

MADE IN THE USA! At HammerHead Spearguns, we take pride in crafting our spear shafts from high-quality, American-sourced stainless steel, meticulously heat-treated for superior performance—right here in the USA.

Manufactured from 17-4 PH stainless steel, HammerHead Evolution shafts are ultra-straight, ultra-hard, and built for maximum durability. Designed with heavy-duty welded fins, they feature Hawaiian-style floppers or threaded ends, ensuring precision and reliability in every shot.

Designed to fit American-style mechanisms such as Alexander, Neptonic, Riffe, and Wong, these Square-Cut shafts are available in multiple diameters including 9/32" (7.1 mm) and 5/16" (7.93 mm) with various fin tab configurations.

Customization Options

HammerHead Spearguns manufactures all shafts in-house in the USA, allowing for customizations such as:

• Multiple fins and loading tabs
• Double floppers
• Welded floppers
• 6 mm and 5/16" threaded shafts
• High-luster polishing

Key Features

• USA Stainless Steel: Rust and corrosion-resistant material.
• Made in the USA: Sourced and manufactured domestically.
• Heat-Treated 17-4 Stainless Steel: Provides additional stiffness and durability.
• Hawaiian Style Flopper: Optimized for precision spearfishing.
• Welded Fins Set Back: Maximizes band stretch for increased power.
• Available in Multiple Sizes: Readily stocked in 9/32" and 5/16" diameters.

Safety Precautions

Improper use of spearguns can be dangerous. Failure to follow instructions could result in serious injury or death. Speargun safety is the user's responsibility.

• NEVER point a speargun at a person or in the vicinity of a person.
• NEVER load a speargun out of the water or keep it loaded out of the water.
• NEVER hand a loaded speargun to another person.
• ALWAYS practice safety when using or handling a speargun.
• ALWAYS use a tip protector when the speargun is not in use.
• ALWAYS use original HammerHead shafts, bands, and replacement parts.