Ronstan RF151 D Shackle 1/4" Pin – Stainless Steel Slotted Pin Shackle

The Ronstan RF151 D Shackle (1/4" Pin) is a robust, marine-grade stainless steel shackle designed for secure, high-strength rigging connections on sailing vessels and general marine applications.

Manufactured from Grade 316 stainless steel, the RF151 offers excellent corrosion resistance and long-term durability, making it ideal for harsh saltwater environments and demanding onboard use.

The 1/4" (6.4mm) slotted pin design allows for easy tightening and removal with a screwdriver while maintaining a low-profile head to reduce snagging on ropes, sails, and rigging systems.

With a breaking load of up to 2300kg (UDL) and 1400kg (point load), the RF151 provides significantly more strength than smaller shackles, making it ideal for medium-load rigging, blocks, and hardware connections.

The classic D (Dee) shackle shape ensures optimal load alignment in straight-line applications, delivering a reliable and compact connection point across a wide range of marine uses.

Key Features

• Grade 316 stainless steel – superior corrosion resistance
• 1/4" (6.4mm) slotted pin – secure, easy to tighten and remove
• High strength (2300kg UDL breaking load)
• Low-profile pin head – reduces snagging on lines
• High strength-to-weight ratio – durable yet compact
• Reliable D-shackle design – ideal for inline load applications

Specifications

• Brand: Ronstan
• Model: RF151
• Product Type: D (Dee) shackle
• Pin Diameter: 1/4" (6.4mm)
• Internal Length: ~22mm
• Internal Width: ~16mm
• Breaking Load (UDL): 2300kg
• Breaking Load (Point Load): 1400kg
• Weight: ~20g
• Material: Grade 316 stainless steel

Ideal Applications

• Medium-duty rigging connections
• Block and pulley attachment
• Sheets, halyards, and deck hardware
• Trailer boats and keelboats
• General marine hardware connections

This shackle is ideal where you need a stronger, more robust connection than smaller shackles while maintaining a compact profile.

Why Buy from Barton Marine NZ?

• Trusted NZ Ronstan hardware supplier
• Fast nationwide delivery
• Genuine marine-grade stainless fittings
• Ideal for NZ coastal and offshore conditions

Pro Tip  

• Use seizing wire or thread locker to prevent pin loosening under vibration
• Step up to RF151 when RF150 is not strong enough for the load
• Keep multiple sizes onboard for quick rigging adjustments