Harken 25mm Low-Load Base Swivel – Stand-Up Block

The Harken 25mm Low-Load Base Swivel is a versatile stand-up block base designed for smooth articulation and reliable performance in sailing and marine rigging systems. Ideal for use with Harken 2.25″, Little Fiddle, and ratchet blocks, this marine swivel base keeps blocks upright while allowing them to pivot and rotate freely under load.

The ball-and-socket design enables blocks to articulate up to 45 degrees and swivel smoothly, ensuring optimal line alignment and reduced friction. This flexible movement allows sheets and control lines to run cleanly while maintaining efficient load handling.

Engineered from durable marine-grade materials, the Harken 25mm swivel base is a dependable choice for dinghies, small keelboats, and performance sailing setups where compact, lightweight hardware is essential.

Key Features

• Compatible with Harken 2.25″, Little Fiddle, and ratchet blocks

• Stand-up base design keeps blocks upright and properly aligned

• Ball-and-socket articulation up to 45 degrees for improved line lead

• Smooth swivel action for efficient rope handling

• Durable marine hardware designed for sailing and rigging applications

Specifications

• Height: 44 mm
• Weight: 85 g
• Base Diameter: 54 mm
• Inside Socket Diameter: 10 mm
• Pin Diameter: 5 mm
• Fasteners: 5 mm FH
• Maximum Working Load: 181 kg
• Breaking Load: 590 kg